{"id":274064,"date":"2025-07-05T01:00:00","date_gmt":"2025-07-05T05:00:00","guid":{"rendered":"https:\/\/inspenet.com\/?post_type=articulo&#038;p=274064"},"modified":"2025-07-09T15:22:54","modified_gmt":"2025-07-09T19:22:54","slug":"explosion-welding-in-dissimilar-metals","status":"publish","type":"articulos","link":"https:\/\/inspenet.com\/en\/articles\/explosion-welding-in-dissimilar-metals\/","title":{"rendered":"Explosion welding applied to cladding of dissimilar metals"},"content":{"rendered":"\n<p>In industries facing aggressive environments, high pressures and elevated temperatures, protecting structural materials from corrosion and erosion is a priority challenge. One of the most effective and reliable solutions is explosion welding, a solid-state joining technique widely used in cladding processes. This method combines dissimilar metals while maintaining the structural integrity and original thermal properties of the materials involved.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Purpose of explosion welding<\/h2>\n\n\n\n<p>The primary goal is to create a strong metallurgical bond between different metals using controlled explosive energy. This technique applies a corrosion- and erosion-resistant metal cladding layer without melting the materials. It minimizes thermal defects, retains the original properties of the metals, and offers an economical solution by applying only a thin noble metal layer over a cheaper structural base.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How explosion welding works<\/h2>\n\n\n\n<p>Explosion welding is a solid-state joining process that uses the energy from a controlled explosive charge to force two different metals into high-speed collision. Unlike fusion welding, this method does not melt the materials, thereby eliminating heat-affected zones (HAZ) and significantly reducing thermal defects.<\/p>\n\n\n\n<p>The process involves placing two metal plates, one thicker and lower-cost base plate (e.g., carbon steel) and one thinner cladding plate made of corrosion-resistant material (e.g., stainless steel, titanium, copper, or nickel alloy). <\/p>\n\n\n\n<p>An explosive charge is carefully distributed on top of the cladding plate. Upon detonation, a shock wave drives the cladding plate toward the base plate at a precise angular velocity, producing a firm metallurgical bond without melting. The result is a characteristic <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S2238785423016071\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S2238785423016071\" rel=\"noreferrer noopener\">wavy interface<\/a>, which confirms the solid-state nature of the bond and enhances mechanical anchoring between both materials.<\/p>\n\n\n\n<p>For more information on the subject, I invite you to watch the following video. Source: ReP Facts Operational Facts.<\/p>\n\n\n<div class=\" align\"><div id=\"wpfp_4936\" data-item=\"{&quot;sources&quot;:[{&quot;src&quot;:&quot;https:\\\/\\\/youtu.be\\\/VXS_4uSSVVg&quot;,&quot;type&quot;:&quot;video\\\/youtube&quot;,&quot;sources_fvqs&quot;:[{&quot;src&quot;:&quot;https:\\\/\\\/youtu.be\\\/VXS_4uSSVVg&quot;,&quot;type&quot;:&quot;video\\\/youtube&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/youtu.be\\\/VXS_4uSSVVg&quot;,&quot;type&quot;:&quot;video\\\/youtube&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/youtu.be\\\/VXS_4uSSVVg&quot;,&quot;type&quot;:&quot;video\\\/youtube&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/youtu.be\\\/VXS_4uSSVVg&quot;,&quot;type&quot;:&quot;video\\\/youtube&quot;},{&quot;src&quot;:&quot;https:\\\/\\\/youtu.be\\\/VXS_4uSSVVg&quot;,&quot;type&quot;:&quot;video\\\/youtube&quot;}]}],&quot;id&quot;:&quot;5711&quot;,&quot;fv_title&quot;:&quot;Explosive welding.&quot;,&quot;splash&quot;:&quot;https:\\\/\\\/i.ytimg.com\\\/vi\\\/VXS_4uSSVVg\\\/maxresdefault.jpg#auto&quot;}\" class=\"freedomplayer flowplayer no-brand is-splash is-paused skin-custom no-svg fp-full fp-outlined has-title-below is-youtube is-youtube-standard\" data-button-repeat=\"1\" data-button-rewind=\"1\" data-fv-embed=\"https:\/\/inspenet.com\/en\/articles\/explosion-welding-in-dissimilar-metals\/fvp-4936\/\" style=\"position:relative; max-width: 95%; max-height: 90%; \" data-ratio=\"0.5625\" data-qsel=\"1080p,720p,480p,360p\" data-qlabels=\"1080p,720p,480p,360p\" data-fv_stats_data=\"{&quot;player_id&quot;:&quot;4936&quot;,&quot;post_id&quot;:274064}\" data-engine=\"fvyoutube\" data-speedb=\"1\">\n\t<div class=\"fp-ratio\" style=\"padding-top: 56.25%\"><\/div>\n\t<img decoding=\"async\" style=\"position:absolute;top:0;left:0;width:100%\" class=\"fp-splash\" alt=\"Explosive welding.\" src=\"https:\/\/i.ytimg.com\/vi\/VXS_4uSSVVg\/maxresdefault.jpg#auto\" \/>\n\t<div class=\"fp-ui\" style=\"position:absolute\"><noscript>Please enable JavaScript<\/noscript><div class=\"fp-play fp-visible\"><svg class=\"fp-play-rounded-outline\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 99.844 99.8434\"><defs><style>.fp-color-play{opacity:0.65;}.controlbutton{fill:#fff;}<\/style><\/defs><title>play-rounded-outline<\/title><path class=\"fp-color-play\" d=\"M49.9217-.078a50,50,0,1,0,50,50A50.0564,50.0564,0,0,0,49.9217-.078Z\"\/><path class=\"controlbutton\" d=\"M41.0359,71.19a5.0492,5.0492,0,0,1-2.5575-.6673c-1.8031-1.041-2.7958-3.1248-2.7958-5.8664V35.1887c0-2.7429.9933-4.8272,2.797-5.8676,1.8025-1.0422,4.1034-.86,6.48.5143L70.4782,44.5672c2.3751,1.3711,3.6826,3.2725,3.6832,5.3545s-1.3076,3.9845-3.6832,5.3562L44.9592,70.0114A7.9384,7.9384,0,0,1,41.0359,71.19Zm.0065-40.123a2.6794,2.6794,0,0,0-1.3582.3413c-1.0263.5926-1.5912,1.9349-1.5912,3.78V64.6563c0,1.8449.5649,3.1866,1.5906,3.7791,1.0281.5932,2.4733.4108,4.07-.512L69.273,53.1906c1.5983-.9227,2.478-2.0838,2.478-3.2689s-.88-2.3445-2.478-3.2666L43.754,31.9227A5.5685,5.5685,0,0,0,41.0423,31.0671Z\" filter=\"url(#f1)\"\/><\/svg><\/div><div class=\"fp-preload\"><b><\/b><b><\/b><b><\/b><b><\/b><\/div><\/div>\n<div class='fvp-share-bar'><div><label><a class=\"embed-code-toggle\" href=\"#\"><strong>Embed<\/strong><\/a><\/label><\/div><div class=\"embed-code\"><label>Copy and paste this HTML code into your webpage to embed.<\/label><textarea><\/textarea><\/div><\/div>\n<\/div>\n<p class='fp-title'>Explosive welding.<\/p><\/div>\n\n\n<h3 class=\"wp-block-heading\">Importance of the wavy interface<\/h3>\n\n\n\n<p>The undulated interface formed during explosion welding acts as a mechanical buffer:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It improves stress distribution caused by differences in thermal expansion.<\/li>\n\n\n\n<li>It increases the contact surface area, improving adhesion.<\/li>\n\n\n\n<li>It absorbs differential movement, delaying delamination or separation failure.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter is-resized\"><img decoding=\"async\" src=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXdRT9FyoEmugLl4TBkxEQ1J9NYilgJ5tNQaG0AlZLu1umVptASj_weE8PKjAixvWfZ3dPc6rQ-iwGMbGrarmIzjRzrWQSNW2GEk2SvY2P6ruu2itkqXBpUaFFAVdBLrTITqhsgXxBUtKqJYsliAUN4?key=TlU-4Yzqv6jEW_r2yQPvCw\" alt=\"https:\/\/lh7-rt.googleusercontent.com\/docsz\/AD_4nXeZSoOsPfqyjhFLLRfCcsL762rVBhMPBV-cZrbSuXi-qGwmim9dl6e8lwQxACepEwhlqVSgKm6fUYvtKpZN-aznvH6a_VNxAtpBoojwzh0hrBUGS9E9p9Z44k2upIEktimvKivuOna84KKGs46Elw?key=44Px1YbeFnB2QfHwqssCuw\" style=\"width:840px;height:auto\"\/><figcaption class=\"wp-element-caption\">Explosion welded plate with different corrugated interfaces. Source: THetech electronics.<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">How explosive energy is applied in explosion welding<\/h2>\n\n\n\n<p>Applying explosive energy is a critical stage. It\u2019s not a simple detonation, but a precisely engineered event designed to achieve a clean bond without damaging the metals.<\/p>\n\n\n\n<p>Key design considerations include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Type and thickness of metals: These determine the energy required to induce proper deformation and bonding.<\/li>\n\n\n\n<li>Explosive type and detonation velocity: These affect collision speed and pressure; must be tuned to the specific metal pair.<\/li>\n\n\n\n<li>Impact angle: Influences the formation of the wavy interface and bonding quality.<\/li>\n\n\n\n<li>Standoff distance: Controls the cladding plate&#8217;s acceleration before impact to ensure a clean, uniform bond.<\/li>\n<\/ul>\n\n\n\n<p>A detonator initiates a controlled reaction that generates transient pressures of several gigapascals for a few microseconds. This drives the cladding plate into angular collision with the base metal, stripping surface impurities and creating a solid metallurgical bond without altering the materials\u2019 microstructure. The outcome is a high-quality industrial metal cladding with no melted zones or thermal degradation.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common explosives used in explosion welding<\/h2>\n\n\n\n<p>Explosives are selected based on their power, safety, and compatibility with the metals being bonded:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>RDX (Cyclotrimethylenetrinitramine): High detonation velocity (~8,750 m\/s); ideal for producing clean joints with defined wavy interfaces. Common in high-quality bimetallic plates.<\/li>\n\n\n\n<li>ANFO (Ammonium Nitrate-Fuel Oil): Cost-effective and easy to handle, with a moderate detonation velocity (~3,200\u20134,500 m\/s). Used in large-scale applications where extreme explosive force isn&#8217;t necessary.<\/li>\n\n\n\n<li>PETN (Pentaerythritol Tetranitrate): Highly energetic and sensitive. Detonation velocity ~8,400 m\/s. Suitable for bonding thin cladding layers.<\/li>\n\n\n\n<li>C4 (RDX-based with plasticizers): Moldable, water-resistant, and stable. Detonation velocity ~8,040 m\/s. Useful for irregular geometries.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Properties of metal cladding by explosive welding<\/h2>\n\n\n\n<p>Explosion welding produces unique, high-performance joints with advantages such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High bond strength: Far exceeds conventional welding.<\/li>\n\n\n\n<li>No fusion zone: Prevents solidification cracking and preserves original grain structure.<\/li>\n\n\n\n<li>Wavy metallurgical interface: Enhances mechanical interlocking, reducing delamination risk.<\/li>\n\n\n\n<li>Material compatibility: Enables bonding of challenging combinations like titanium-to-steel, copper-to-steel, and stainless-to-aluminum.<\/li>\n<\/ul>\n\n\n\n<p>These properties make explosion-welded cladding suitable for demanding industrial environments.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common dissimilar metal combinations in explosion welding<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Base metal<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Cladding metal<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Carbon Steel<\/td><td class=\"has-text-align-center\" data-align=\"center\">Stainless Steel<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Carbon Steel<\/td><td class=\"has-text-align-center\" data-align=\"center\">Titanium<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Carbon Steel<\/td><td class=\"has-text-align-center\" data-align=\"center\">Copper or Brass<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Carbon Steel<\/td><td class=\"has-text-align-center\" data-align=\"center\">Nickel or Nickel Alloys<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Stainless Steel<\/td><td class=\"has-text-align-center\" data-align=\"center\">Aluminum<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Industrial applications of explosion welded cladding<\/h2>\n\n\n\n<p>Explosion welding is a strategic technology for industries requiring robust bonds between dissimilar metals. Common applications include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pressure vessels: As per ASME VIII Div 1, explosion-welded bimetallic plates provide corrosion-resistant liners with a strong structural base.<\/li>\n\n\n\n<li>Heat exchangers: Require high thermal conductivity and resistance to aggressive fluids.<\/li>\n\n\n\n<li>Bimetallic plates: Used in distillation columns, reactors, and processing equipment.<\/li>\n\n\n\n<li>Naval and aerospace components: Where weight reduction and corrosion resistance are critical.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Design considerations in explosion welding<\/h2>\n\n\n\n<p>Proper design demands careful assessment of multiple variables:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Metallurgical compatibility: Avoid combinations that form brittle or reactive phases. Keep thermal expansion mismatch ideally below 5\u20137 x\u202f10\u207b\u2076\u202fK\u207b\u00b9. Intermediate layers (e.g., nickel) may be used between incompatible metals like steel and copper.<\/li>\n\n\n\n<li>Explosive energy: The charge and detonation velocity must be adjusted to avoid damaging the plates.<\/li>\n\n\n\n<li>Joint geometry: Initial plate spacing, collision angle, and thickness influence interface quality.<\/li>\n\n\n\n<li>Surface preparation: Clean, flat surfaces are essential for optimal bonding.<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/inspenet.com\/en\/articulo\/finite-element-analysis-applications\/\" target=\"_blank\" rel=\"noreferrer noopener\">FEM simulation (Finite Element Method)<\/a><\/strong>: Predicts thermal stresses, deformations, and validates parameters pre-detonation.<\/li>\n\n\n\n<li>Standards: Must comply with specifications like ASTM B898 and ASME VIII.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Quality control in explosion welding<\/h2>\n\n\n\n<p>Ensuring a reliable explosion-welded joint requires rigorous controls across three stages:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Before the process:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Material verification: Confirm specs, certificates, and compatibility.<\/li>\n\n\n\n<li>Surface preparation: Visual inspection and mechanical\/chemical cleaning.<\/li>\n\n\n\n<li>Geometry configuration: Measure spacing, alignment, and impact angle.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">During the process:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Environmental monitoring: Weather, safety perimeter, and explosive containment.<\/li>\n\n\n\n<li>Explosive control: Type, mass, detonation speed, and distribution.<\/li>\n\n\n\n<li>Detonation log: Chronology, pressure generated, and material response.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">After the process:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Visual and dimensional inspection: Check bond continuity and flatness.<\/li>\n\n\n\n<li>Non-destructive testing (NDT): Phased Array Ultrasonic Testing (PAUT) to verify adhesion and absence of defects.<\/li>\n\n\n\n<li>Mechanical testing: Shear, tensile, and hardness testing to validate bond strength.<\/li>\n\n\n\n<li>Hot shear tests: Evaluate high-temperature adhesion performance.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusions<\/h2>\n\n\n\n<p>Explosion welding for metal cladding of dissimilar metals is an advanced technique that produces durable, high-performance joints. It preserves thermal conductivity, avoids heat-affected zones, and withstands extreme conditions\u2014making it ideal for the fabrication of industrial cladding systems.<\/p>\n\n\n\n<p>From bimetallic plates to ASME VIII-regulated equipment, this technology is expanding its reach, supported by FEM simulation and standards such as ASTM B898. Modern engineering continues to balance performance, durability, and cost-effectiveness in designing critical components.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">References<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Zhou, Q., Lu, H., Lan, X., Guo, Y., Liu, K., Huang, G., Jia, B., &amp; Chen, P. (2023). Anisotropy in microstructure and shear properties of TA2\/Q235 explosive welding interfaces. <em>Journal of Materials Research and Technology, 25<\/em>, 6472\u20136491. <a>https:\/\/doi.org\/10.1016\/j.jmrt.2023.06.129<\/a><\/li>\n\n\n\n<li>https:\/\/thetech.com.vn\/en\/what-is-explosion-welding-advantages-disadvantages-and-applications\/<\/li>\n\n\n\n<li>Inspenet. (2025). <em>Detaclad: Soldadura por explosi\u00f3n \u2013 AMPP 2025<\/em> [Video]. Inspenet. https:\/\/inspenet.com\/video-tv\/detaclad-soldadura-por-explosion-ampp-2025\/<\/li>\n\n\n\n<li>Inspenet. (n.d.). <em>Finite element analysis applications<\/em>. Inspenet. https:\/\/inspenet.com\/en\/articulo\/finite-element-analysis-applications\/<\/li>\n<\/ol>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Reliable and efficient technology for joining dissimilar metals using explosion welding in industrial cladding.<\/p>\n","protected":false},"author":8051,"featured_media":275031,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_bbp_topic_count":0,"_bbp_reply_count":0,"_bbp_total_topic_count":0,"_bbp_total_reply_count":0,"_bbp_voice_count":0,"_bbp_anonymous_reply_count":0,"_bbp_topic_count_hidden":0,"_bbp_reply_count_hidden":0,"_bbp_forum_subforum_count":0,"footnotes":""},"categoria_articulos":[7744],"etiqueta_articulos":[10888,12023,12027],"class_list":["post-274064","articulos","type-articulos","status-publish","format-standard","has-post-thumbnail","hentry","categoria_articulos-equipment-inspection","etiqueta_articulos-protection-systems","etiqueta_articulos-welding","etiqueta_articulos-welding-processes"],"acf":[],"_links":{"self":[{"href":"https:\/\/inspenet.com\/en\/wp-json\/wp\/v2\/articulos\/274064","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inspenet.com\/en\/wp-json\/wp\/v2\/articulos"}],"about":[{"href":"https:\/\/inspenet.com\/en\/wp-json\/wp\/v2\/types\/articulos"}],"author":[{"embeddable":true,"href":"https:\/\/inspenet.com\/en\/wp-json\/wp\/v2\/users\/8051"}],"replies":[{"embeddable":true,"href":"https:\/\/inspenet.com\/en\/wp-json\/wp\/v2\/comments?post=274064"}],"version-history":[{"count":0,"href":"https:\/\/inspenet.com\/en\/wp-json\/wp\/v2\/articulos\/274064\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inspenet.com\/en\/wp-json\/wp\/v2\/media\/275031"}],"wp:attachment":[{"href":"https:\/\/inspenet.com\/en\/wp-json\/wp\/v2\/media?parent=274064"}],"wp:term":[{"taxonomy":"categoria_articulos","embeddable":true,"href":"https:\/\/inspenet.com\/en\/wp-json\/wp\/v2\/categoria_articulos?post=274064"},{"taxonomy":"etiqueta_articulos","embeddable":true,"href":"https:\/\/inspenet.com\/en\/wp-json\/wp\/v2\/etiqueta_articulos?post=274064"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}