摘要
传统牌号高强镍基高温合金具有较宽的凝固温度区间、较高比例的低熔点共晶相,在增材制造快速非平衡凝固过程中易产生裂纹等缺陷;同时,热处理过程中残余应力释放和γ’相快速析出导致应变时效裂纹的形成,严重限制了其在激光增材制造领域的应用与推广。基于此,本文综述了近年来国内外研究组及作者团队在选区激光熔化高强镍基高温合金裂纹形成机理与抗裂纹设计(成形工艺参数优化、热处理制度调控以及合金成分设计)领域相关的研究进展,并对激光增材制造γ’相强化镍基高温合金裂纹调控的研究进行了展望。
Traditional high-strength nickel-based superalloys have a wide solidification temperature range and high proportion of low melting point eutectic phases, which are prone to cracking during rapid nonequilibrium solidification. The residual stress release and rapid nucleation of γ’ precipitate during the post-heat treatment process result in crack formation for high-strength nickel-based superalloys, which limits their application and promotion in the field of additive manufacturing. In this review, the research progress in crack formation mechanism and cracking-free design(printing parameter optimization, post-treatment regulation, and alloying design) of high-strength nickel-based superalloys fabricated via additive manufacturing is presented. Additionally, research prospects related to crack control of additively manufactured high-strength nickel-based superalloys are proposed.
作者
祝国梁
孔德成
周文哲
贺戬
董安平
疏达
孙宝德
ZHU Guoliang;KONG Decheng;ZHOU Wenzhe;HE Jian;DONG Anping;SHU Da;SUN Baode(Shanghai Key Laboratory ofAdvanced High Temperature Materials and Precision Forming,School ofMaterials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;State Key Laboratory ofMetal Matrix Composite Materials,Shanghai Jiao Tong University,Shanghai 200240,China)
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2023年第1期16-30,共15页
Acta Metallurgica Sinica
基金
中国博士后科学基金项目No.2022TQ0203。
关键词
选区激光熔化
高强镍基高温合金
裂纹
抗裂纹设计
selective laser melting
high-strength nickel-based superalloy
crack
cracking-free design
