Inconel718合金增材制造残余应力分布与数值模拟分析  

Residual Stress Distributions of Laser Additive Manufactured Inconel 718 Alloy and Its Numerical Simulation and Analysis

作　　者：姚晨光 安志斌[2] 杨竹芳[2] YAO Chenguang;AN Zhibin;YANG Zhufang(Modern Educational Technology Centre, China Women’s University, Beijing 100101, China;Science and Technology on Plasma Dynamic Laboratory, Air Force Engineering University, Xi’an 710038, China)

机构地区：[1]中华女子学院现代教育技术中心,北京100101 [2]空军工程大学等离子体动力实验室,陕西西安710038

出　　处：《机械制造与自动化》2019年第4期134-136,179,共4页Machine Building & Automation

摘　　要：由于Inconel718合金优异的力学性能,在航空发动机中被广泛应用。对于失效后的通过激光增材制造In718零部件,其修复表面残余应力对修复件力学性能有着重要的影响。研究了In718合金在X射线衍射(XRD)检测设备下的应力分布规律,采用Sysweld软件提供的应力场分析工具对修复件单道、多道进行残余应力进行数值模拟分析,将模拟结果与实际残余应力进行分析对比。XRD残余应力结果表明:上下表面x/y方向平均残余应力值分别为16.06MPa/12.15MPa和118.50MPa/125.10MPa。多道数值模拟最大值为266MPa,实际测量值的最大应力为281.01MPa,且所有应力值皆>0。Inconel718 alloy is widely used in aircraft engine, due to its excellent mechanical properties. The damaged In718 components, normally, are repaired by laser additive manufacturing. The residual stress on the surface has great influence on the dynamic performance of the repaired parts. Therefore, this paper mainly studies the residual stress distributions of In718 alloy by X ray diffraction(XRD), and uses Sysweld to simulate the one channel, multi-channel laser cladding. The simulated results is compared with that of the actual test. The mean values of XRD residual stress in x / y direction of upper/ lower surfaces are 16.06 MPa/12.15 MPa and 118.50 MPa/125.10 MPa respectively. The maximum value of multichannel numerical simulation is 266 MPa while the maximum value of the actual measured stress is 281.01 MPa, and all the stress values are>0.

关 键 词：INCONEL718合金 激光増材制造 XRD 残余应力 SYSWELD 

分 类 号：TG115[金属学及工艺—物理冶金]