以Zener—Hollomon参数表示的GH169合金的本构关系  

THE CONSTITUTIVE RELATIONSHIP FOR GH169 ALLOY AS A FUNCTION OF ZENER-HOLLOMON PARAMETER

作　　者：刘东[1] 罗子健[1] 

机构地区：[1]西北工业大学

出　　处：《塑性工程学报》1995年第1期15-21,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金;航空科学基金

摘　　要：根据ＧＨ１６９合金在Ｔｈｅｒｍｅｃｍａｃｓｔｏｒ—Ｚ型热加工模拟试验机上进行等温恒应变速率压缩试验数据提出一种以Ｚｅｎｅｒ—Ｈｏｌｌｏｍｏｎ参数（简称Ｚ—Ｈ参数）表示，从而可以直接研究该合金锻造热力参数的本构关系：其中Ｚ为Ｚ—Ｈ参数；Ｄ０、Ｄ１、Ｄ２、Ｄ３均为等效应变的函数。在绝大多数情况下，计算结果与实验数据的误差不超过７％。对ＧＨ１６９合金锻造过程用有限元法进行数值模拟时，采用本文提供的本构关系将使公式推导过程简化，计算时间大幅度减少。n the paper,a constitutive relationship as a function of Zener-Hollomon parameter (Z-H parameter) was formulated for GH169 alloy. Based on the experimental results of isothermal constant strain rate compression of GH169 alloy at Thernlecmastor-Zhot working simulator, the obtained constitutive relationship for it is as follows: d ￣ D, + D,lnZ + D, (InZ )2 + D, (InZ )3, where Z-Z-H parameter;D0, D1, D2, D3-functions of equivalent strain,respectively. The deviation of the calculating results using the proposed relationship from the experimental daat is less than 7% mostly. According to the Liapunov stability theory, the process window for GH169 alloy can be dirvectly defined from the constitutive relationship expressed in terms of Z-H parameter. While incorporating the proposed constitutive relationship into finite element method to simulate the forging process of GH169 alloy, the procedure of formulae derivation will be simplified and the omputation time will be saved to a great extent.

关 键 词：本构关系 GH169合金 Z-H参数 锻造 热力参数 

分 类 号：TG317[金属学及工艺—金属压力加工]