0Cr18Ni24Mo6N奥氏体焊缝金属循环塑性变形的力学本构关系  

Mechanical Constitutive Relation under Cyclic Loading of 0Cr18Ni24Mo6N Weld Metal

作　　者：薛钢[1] 宫旭辉[1] 王涛[1] 方洪渊[2] 高珍鹏 

机构地区：[1]中国船舶重工集团公司第七二五研究所,河南洛阳471023 [2]哈尔滨工业大学先进焊接与连接国家重点试验室,黑龙江哈尔滨150001

出　　处：《材料开发与应用》2015年第5期1-7,共7页Development and Application of Materials

摘　　要：针对0Cr18Ni24Mo6N奥氏体焊缝金属开展了系列应变幅的循环加载试验,并分析了循环应力应变特性。结果表明:循环塑性变形条件下表观弹性模量随应变幅的增大呈线性降低特点;循环塑性应变显著降低屈服强度,且屈服强度随应变幅的增大呈线性降低特点;塑性变形段的真应力和真应变塑性分量满足单对数强化弹塑性本构关系,并建立了0Cr18Ni24Mo6N奥氏体焊缝金属循环应力应变本构方程。Cyclic loading tests with variable strain amplitudes were conducted on 0Cr18Ni24Mo6 N weld metal and cyclic stressstrain behavior was analyzed. The results indicated that elastic modulus and yield stress both decreases linearly with increasing strain amplitude. Linear relationship was found between true stress and true strain logarithm in plastic deformation region. True stress and true strain met the single logarithm constitutive model in cyclic plastic deformation region and the parameters of this model for 0Cr18Ni24Mo6 N weld metal were determined.

关 键 词：OCr18Ni24Mo6N奥氏体焊缝金属 循环应力应变 本构关系 

分 类 号：TG314.4[金属学及工艺—金属压力加工]