TiB95合金热压缩流变应力研究  

Study on flow stress of TiB95 alloy in hot compression

作　　者：杨青云[1] 李冲[1,2] 吕光辉 韩广 YANG Qingyun;LI Chong;LV Guanghui;HAN Guang(Luoyang Ship Material Research Institute,China Shipbuilding Industry Corporation,Luoyang 471000,Henan China;National Local Joint Engineering Research Center for Advanced Titanium and Titanium Alloy Materials Technology,Luoyang 471023,Henan China)

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]先进钛及钛合金材料技术国家地方联合工程研究中心,河南洛阳471023

出　　处：《锻压装备与制造技术》2022年第5期127-130,共4页China Metalforming Equipment & Manufacturing Technology

摘　　要：利用Gleeble3500热模拟机,研究TiB95合金在高温塑性变形过程中的流变应力行为,试验应变速率为0.01~10s^(-1),变形温度为850℃~1050℃,变形量均为60%。对TiB95合金真应力-真应变曲线进行分析,结果表明:在相同的应变速率下,流变应力随着温度的升高而降低;而在相同的变形温度下,流变应力随着应变速率的减小而降低。同时,通过Zener-Hollomon模型建立的TiB95合金高温变形时的流变应力模型表征了变形温度、应变速率和变形程度对流动应力的影响,模型的计算精度较高,形变激活能Q为723.679kJ/mol。The flow stress behavior of TiB95 alloy during high temperature plastic deformation has been studied by use of Gleeble 3500 thermal simulator.The experimental strain rate is 0.01~10s^(-1),the deformation temperature is 850℃~1050℃,and the deformation is 60%.The true stress true strain curve of TiB95 alloy has been analyzed.The results show that the flow stress decreases with the increase of temperature at the same strain rate;at the same deformation temperature,the flow stress decreases with the decrease of strain rate.Meanwhile,the flow stress model of TiB95 alloy during high temperature deformation established by Zener Hollomon model characterizes the influence of deformation temperature,strain rate and deformation degree on flow stress.The calculation accuracy of the model is high,and the deformation activation energy Q is 723.679KJ/mol.

关 键 词：TiB95合金 热模拟实验 流变应力 Zener-Hollomon模型 

分 类 号：TG146.23[一般工业技术—材料科学与工程]