镍铝青铜高温热压缩流变行为研究  

Flow stress behavior of Ni-Al Bronze under hot compression deformation

作　　者：苑伟 罗皓[1] 马艳霞[1] 周铁柱 郁炎[1] YUAN Wei;LUO Hao;Ma Yanxia;ZHOU Tiezhu;YU Yan(Luoyang Ship Material Research Institute,Luoyang 471023,He'nan China)

机构地区：[1]中国船舶重工集团公司第七二五研究所

出　　处：《锻压装备与制造技术》2019年第4期101-104,共4页China Metalforming Equipment & Manufacturing Technology

摘　　要：采用Gleeble-3500热模拟机,对镍铝青铜合金在变形温度为750℃~950℃,应变速率为0.01~10s-1条件下的进行等温热压缩变形实验。结果表明:在试验范围内,合金的流变应力随着应变温度的升高而降低,随着应变速率的增大而增大。用ZenerHollomon参数对镍铝青铜合金高温流变应力行为进行描述,并计算得到该合金的本构方程,其形变激活能Q为209.108KJ/mol。The hot compression deformation experiment of Nickel-Aluminum Bronze alloy has been conducted at the temperature range of 750~950℃ and strain rate of 0.01~10 s-1 on Gleeble-3500 thermal simulator.The experimental results show that the flow stress of Nickel-Aluminum Bronze alloy decreases with the increase of temperature and enhances with the increase of strain rate. The constitutive equation has been established on the basis of stress-strain data by use of Zener-Hollomon parameter. The hot deformation activation energy Q is 209.108 kJ/mol.

关 键 词：镍铝青铜合金 热压缩变形 流变应力 本构方程 

分 类 号：TG146.11[一般工业技术—材料科学与工程]