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This article addresses the general welding characteristics common to both solid-solution-strengthened and precipitation-hardened nickel-, iron-, and cobalt alloys.

This article focuses on the physical metallurgy of nonferrous high-temperature materials that affects weldability on the precipitates used for age hardening (strain-age cracking). Those precipitates associated with solidification and solidification segregation, primarily Laves and carbides (heat-affected zone grain boundaries cracking), are also discussed. The article examines the parameters that affect heat-affected zone liquation cracking and presents a solution for each problem.

This article provides an overview of the types of postweld heat treatment processes carried out in solid-solution-strengthened and precipitation-strengthened nonferrous high-temperature nickel and cobalt alloys.

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