δ相球化演变对Inconel718合金室温力学性能的影响  

Effect ofδ-phase Spheroidization Evolution on Mechanical Properties of Inconel718 Alloy at Room Temperature

作　　者：马迪 魏刚[1] 张镜斌[1] 杨艳[1] 刘洲超 张伟强[1] MA Di;WEI Gang;ZHANG Jingbin;YANG Yan;LIU Zhouchao;ZHANG Weiqiang(No.12 Research Institute of CSIC,Xingping 713102,China)

机构地区：[1]中国船舶重工集团公司第十二研究所,陕西兴平713102

出　　处：《热加工工艺》2021年第4期124-130,共7页Hot Working Technology

摘　　要：针对Inconel718合金时效态针状δ相在980、1010℃保温过程的固溶球化现象,采用OM、SEM、TEM等方法研究了δ相的球化演变规律,分析了δ相形态、含量对合金室温变形行为的影响机理。结果表明:在980℃保温30~75 min和1010℃保温75~150 min过程中时效态δ相出现固溶平衡现象,体积分数分别稳定在17%和6%;δ相含量相同时,球状δ相相比针状δ相与位错表现出更好的兼容性,球状δ相的存在更有利于提升合金的成形性能;合金的拉伸断裂为微孔聚合型韧性断裂机制,δ相为微孔形成的核心。The spheroidization evolution law of theδphase of Inconel718 alloy was studied by OM,SEM,TEM and other methods,aiming at the solid solution spheroidization of needle-like phase at 980℃and 1010℃heat preservation.The effects ofδphase morphology and content on deformation behavior of alloy at room temperature were analyzed.The results show that the solution equilibrium phenomenon occurs in the aging state of 980℃heat preservation 30-75 min and 1010℃heat preservation for 75-150 min,the volume fractions stabilize at 17%and 6%,respectively.When the content ofδphase is the same,the sphericalδphase shows better compatibility with dislocation than the needleδphase,the sphericalδphase is more conducive to improving the forming properties of the alloy.Tensile fracture of the alloy is a microporous polymerized ductile fracture mechanism,and theδphase is the core of the formation of micropores.

关 键 词：INCONEL718合金 Δ相 时效处理 位错 

分 类 号：TG166.7[金属学及工艺—热处理]