TA15钛合金激光弯曲成形双重扫描相变仿真研究  

Numerical Simulation of Phase Transition in Laser Bending of TA15 Titanium Alloy with Double Scans

作　　者：李紫慧 章直凡 熊亮同 李陈宾 沈洪[2] Li Zihui;Zhang Zhifan;Xiong Liangtong;Li Chenbin;Shen Hong(Beijing Xinghang Electromechanical Equipment Co.,Ltd.,Beijing 100074,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]北京星航机电装备有限公司,北京100074 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《应用激光》2024年第10期204-213,共10页Applied Laser

摘　　要：激光弯曲成形加工中,需要进行多次扫描才能获得较大的弯曲角度,多重扫描过程引入的多次热循环诱发材料组织的复杂转变。以TA15钛合金板材为研究对象,采用数值模拟和实验分析相结合的方法,建立双重加热和冷却过程的相变动力学模型,对激光双重扫描加工过程进行相变仿真,获得不同激光能量密度下板材截面上各相体积分数的分布规律,并与实验结果进行了对比。研究结果表明,相比单次扫描,双重扫描扩大了相变区尺寸,马氏体相总量增多;同时随着激光线能量密度的增大,相变区尺寸增大,而马氏体体积分数减小。Laser bending forming often requires multiple scans to achieve the desired angle,which can alter the sheet material′s structure and impact its mechanical properties.This study focuses on TA15 titanium alloy sheets and employs numerical simulation based on a phase transition dynamics model for dual heating and cooling processes.The simulation models the phase transition during laser dual scanning,revealing the distribution of phase volume fractions across the sheet section under varying laser energy densities and comparing these findings with experimental data.The simulation results indicate that dual scanning increases the phase transition zone size and the total martensitic phase amount.As laser energy density increases,the phase transition zone enlarges,but the martensitic phase volume fraction decreases.This study provides insights into the material structure changes and phase distribution during laser bending of titanium alloy sheets,which is crucial for optimizing the bending process and ensuring material integrity.

关 键 词：激光弯曲成形 TA15钛合金 固态相变 数值模拟 

分 类 号：TG179[金属学及工艺—金属表面处理]