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Weld Heating Rate and the Constitutional Liquation of 纬' Particles of IN738LC Superalloy
The effects of聽聽heating rate on constitutional liquation of 纬' particles of IN738LC Ni-based superalloy was studied. The constitutional liquation of 纬' particles was not clearly observed in the heat afected zone of low power pulsed Nd:YAG laser welded IN738LC alloy. It was found that very high heating rate of low-power pulsed laser welding can reduce the susceptibility of 纬' particles to constitutional liquation. Gleeble simulation at several heating rates and peak temperatures also revealed that the extent of 纬' liquation decreased with an increase in heating rate beyond the critical heating rate for liquation.
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