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材料研究学报  2026, Vol. 40 Issue (10): 792-800    DOI: 10.11901/1005.3093.2025.371
  研究论文 本期目录 | 过刊浏览 |
激光熔融制造Ti6Al4V合金薄壁件变形的数值模拟
孙文博1, 李应举2, 冯小辉2(), 邱义2, 董志国2, 曹大力1()
1.沈阳化工大学材料科学与工程学院 沈阳 110142
2.中国科学院金属研究所 沈阳 110016
Numerical Simulation of Deformation Control for Laser Additive Manufacturing of Ti6Al4V Thin-walled Part
SUN Wenbo1, LI Yingju2, FENG Xiaohui2(), QIU Yi2, DONG Zhiguo2, CAO Dali1()
1.School of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
引用本文:

孙文博, 李应举, 冯小辉, 邱义, 董志国, 曹大力. 激光熔融制造Ti6Al4V合金薄壁件变形的数值模拟[J]. 材料研究学报, 2026, 40(10): 792-800.
Wenbo SUN, Yingju LI, Xiaohui FENG, Yi QIU, Zhiguo DONG, Dali CAO. Numerical Simulation of Deformation Control for Laser Additive Manufacturing of Ti6Al4V Thin-walled Part[J]. Chinese Journal of Materials Research, 2026, 40(10): 792-800.

全文: PDF(8464 KB)   HTML
摘要: 

使用有限元软件模拟一种Ti6Al4V合金弯管薄壁件的激光粉末床熔融 (Laser powder bed fusion, L-PBF)工艺过程,预测其变形和变形量,研究了激光功率和激光扫描速度等主要工艺参数对薄壁件变形量的影响。结果表明,优化的激光功率和扫描速度分别为180 W和1.2 m/s。在L-PBF实验中使用三坐标测量仪测出的薄壁件尺寸偏差证实,这种模拟结果与测量结果的一致性良好。

关键词 : 金属材料,  数值模拟,  激光粉末床熔融技术,  固有应变,  薄壁件    
Abstract:

Laser powder bed fusion (L-PBF) technique demonstrates tremendous potential in application, but this process tends to generate significant residual stresses within workpieces, potentially causing deformation. Herein, the L-PBF process for a thin-walled Ti6Al4V alloy elbow component was numerically simulated by means of finite element software in terms of the effect of the variation of laser powers and the speed of laser scanning on the deformation of the prepared workpiece of Ti6Al4V alloy. The simulation accurately predicted the deformation trends and magnitudes, quantitatively revealing the influence of laser power and scanning speed on the workpiece deformation. The optimal parameter combination was determined to be 180 W laser power and 1.2 m/s scanning speed based on the numerical investigation. Through L-PBF, a thin-walled Ti6Al4V alloy elbow component was fabricated, of which the deviations of dimensions were measured using a coordinate measuring machine, revealing good consistency between the measured data and the simulation results.

Key words: metallic materials    numerical simulation    laser powder bed fusion    inherent strain    thin-walled part
收稿日期: 2025-12-18     
ZTFLH:  TN249  
通讯作者: 曹大力,副教授,caodali2008@163.com,研究方向为高强铝合金和铜基功能材料;
冯小辉,高级工程师,xhfeng@imr.ac.cn,研究方向为先进金属材料凝固与成形过程
Corresponding author: CAO Dali, Tel: 18604047649, E-mail: caodali2008@163.com;
FENG Xiaohui, Tel: 13609838580, E-mail: xhfeng@imr.ac.cn
作者简介: 孙文博,男,1997年生,硕士生
图1  三维模型网格的划分
SymbolPropertyValue
TsSolid phase line temperature1823 K
TlLiquid phase line temperature1873 K
ΔHslLatent heat of melting419 kJ/kg
CpSpecific heat capacity0.54 J/(g·K)
νPoisson's ratio0.26
ηLoss coefficient0.9
表1  Ti6Al4V合金的属性
图2  Ti6Al4V合金的特性曲线
图3  不同构建高度L-PBF弯管薄壁件的应力-时间曲线
图4  L-PBF弯管薄壁件的三轴方向位移量
图5  在不同激光功率条件下模拟尺寸偏差统计图与X、Y、Z三向轴向位移云图
图6  在不同扫描速度条件下模拟尺寸偏差统计图和X、Y、Z三向轴向位移云图
图7  尺寸偏差的模拟结果与实验测量结果的对比
SectionsMaximum / mmMinimum / mmRange / mm
Section 10.044-0.3520.396
Section 30.408-0.390.798
Section 50.653-0.4561.109
Section 70.962-0.5891.551
Section 81.766-1.9723.738
Section 101.573-1.8533.426
Section 121.193-1.8133.006
表2  工件中不同位置截面的测量数据
图8  模拟结果节点统计
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