基于响应面法的TA5钛合金工艺参数优化  

Optimization of Process Parameters of TA5 Titanium Alloy Based on Response Surface Methodology

作　　者：王俊[1] 王克鲁[1] 鲁世强[1] 李鑫[1] 欧阳德来[2] 邱仟 高鑫 张开铭 Wang Jun;Wang Kelu;Lu Shiqiang;Li Xin;Ouyang Deilai;Qiu Qian;Gao Xin;Zhang Kaiming(School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China;School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063 [2]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《稀有金属材料与工程》2022年第6期2130-2136,共7页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51761029);南昌航空大学研究生创新专项基金(YC2020026)。

摘　　要：在变形温度为850~1050℃、应变速率为0.001~10s^(-1)和最大下压量为60%的条件下,采用Gleeble-3800热模拟试验机对TA5钛合金进行等温恒应变速率压缩试验。基于实验数据,分析TA5钛合金的流变应力曲线,计算出不同工艺参数下的材料参数(变形激活能、Z参数以及功率耗散系数),建立了基于响应面法的工艺参数和材料参数的预测模型,最后对响应面模型进行多目标可视化优化,得到优化后的工艺参数。结果表明:TA5钛合金的流变应力具有负温度相关性和正应变速率敏感性。基于响应面法所建立的预测模型具有较高精度,且优化后的加工参数范围为850~990℃/0.004~0.15 s^(-1)。经组织验证,该区域主要的变形机制为动态回复和动态再结晶。Isothermal constant strain rate compression test of TA5 titanium alloy was carried out by Gleeble-3800 thermal simulator at temperature of 850~1050℃,strain rate of 0.001~10 s^(-1) and maximum deformation of 60%.According to the experimental data,the flow stress curve of TA5titanium alloy was analyzed,and the material parameters(deformation activation energy,Z parameter and power dissipation coefficient)were calculated under different process parameters.In addition,the prediction model of process parameters and material parameters was established by response surface method.Finally,the optimized process parameters were obtained by multi-objective visualization optimization.The results show that the flow stress of TA5 titanium alloy has negative temperature correlation and positive strain rate sensitivity.The prediction model based on the response surface methodology has high accuracy,and the optimized machining parameters range is 850~990℃/0.004~0.15 s^(-1).The main deformation mechanisms of this region are dynamic recovery and dynamic recrystallization.

关 键 词：TA5钛合金 流变应力曲线 响应面法 工艺参数优化 

分 类 号：TG146.23[一般工业技术—材料科学与工程]