激光增材制造过程中循环热输入对组织和性能的影响

王迪, 黄锦辉, 谭超林, 杨永强

Review on Effects of Cyclic Thermal Input on Microstructure and Property of Materials in Laser Additive Manufacturing

WANG Di, HUANG Jinhui, TAN Chaolin, YANG Yongqiang

图8 残余应力形成示意图,及预热温度对晶粒生长的影响[55]

Fig.8 Schematic of residual stress generation (a), and the EBSD images showing the grain orientation of LPBF-processed Ti-45Al-2Cr-5Nb at different preheating temperatures[55] (b) (MZ—melting zone, HAZ—heat affected zone; σtensile—tensile stress, σcompressive—compressive stress, εthermal—thermal strain, εplastic—plastic strain, σys—yield stress)