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This article discusses four types of defects in materials that have been fusion welded and that have been the focus of much attention because of the magnitude of their impact on product quality. These include hot cracks, heat-affected zone (HAZ) microfissures, cold cracks, and lamellar tearing. These defects, all of which manifest themselves as cracks, are characteristic of phenomena that occur at certain temperature intervals specific to a given alloy. The article presents selected alloy 625 compositions used in weldability study.

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Michael J. Cieslak, Cracking Phenomena Associated With Welding, Welding, Brazing and Soldering, Vol 6, ASM Handbook, Edited By David LeRoy Olson, Thomas A. Siewert, Stephen Liu, Glen R. Edwards, ASM International, 1993, p 88–96,

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