In order to reduce the susceptibility of Type 316 weld metal to solidification cracking during welding, the composition is usually chosen to produce about 5% δ-ferrite in the aswelded condition. However, substantial variations in δ-ferrite content and morphology can be observed across a multipass weld. Such variations correspond with the weld bead distribution and are especially pronounced across the interpass boundaries.
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References
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LAIJ. K. L., NATHB., TOWNSENDR. D., and WOODD. S.: Int. Conf. on Welding and fabrication in the nuclear industry’, 3–5 April 1979, BNES HQ, London, cosponsored by the Institution of Mechanical Engineers, the Institution of Metallurgists, and the Welding Institute, paper no. 30.
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LAIJ. K. L. and MESHKATM.: Met. Sei., 1978, 12, 415.
