Effect of Active Interpass Cooling on Temperature and Thermal Stress Evolution of Wire Arc Additively Manufactured Ti6Al4V Alloy

ZHANG Yunshu; SHAO Dandan; DING Donghong; WU Bintao

doi:10.7512/j.issn.1001-2303.2023.02.11

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Effect of Active Interpass Cooling on Temperature and Thermal Stress Evolution of Wire Arc Additively Manufactured Ti6Al4V Alloy
Vol. 53, Issue 2, Pages: 111-116(2023)
Received：16 January 2023，

Published：20 February 2023
DOI： 10.7512/j.issn.1001-2303.2023.02.11
稿件说明：

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张云舒，邵丹丹，丁东红，等.层间强制冷却对电弧熔丝增材制造钛合金温度场和应力场的影响［J］.电焊机，2023，53（2）：111-116. DOI： 10.7512/j.issn.1001-2303.2023.02.11.

ZHANG Yunshu, SHAO Dandan, DING Donghong, et al.Effect of Active Interpass Cooling on Temperature and Thermal Stress Evolution of Wire Arc Additively Manufactured Ti6Al4V Alloy[J].Electric Welding Machine, 2023, 53(2): 111-116. DOI： 10.7512/j.issn.1001-2303.2023.02.11.

摘要

电弧熔丝增材制造中热量积累容易造成零部件成形质量差、沉积效率低等问题。层间强制冷却有利于提高电弧熔丝增材制造效率、改善成形质量，从而获得了一定关注。基于有限元数值模拟分析，模拟了自然对流冷却和层间强制冷却下电弧熔丝增材制造Ti6Al4V钛合金成形过程，分析了层间强制冷却对增材钛合金墙体结构温度场与应力场的影响，并通过实验结果进行了验证。结果表明：层间强制冷却可以有效增加成形过程中的散热，减小墙体结构热量积累、进一步改善成形件中的残余应力以及提升增材效率。

Abstract

Heat accumulation in wire arc additive manufacturing (WAAM) is easy to cause poor forming quality and low deposition efficiency of parts. Active interpass cooling is beneficial to improve the efficiency of WAAM and improve the forming quality

so it has gained some attention. In this study

based on finite element numerical simulation analysis

the forming process of Ti6Al4V alloy made by WAAM under natural convection cooling and active interpass cooling respectively were simulated. By both experiment and numerical simulation

the effect of active interpass cooling on temperature and thermal stress evolution was investigated for thin-wall structure. The results show that active interpass cooling can increase heat dissipation effectively during deposition and reduce heat accumulation of thin-wall structure

further improve the residual stress in the forming parts and increase the WAAM efficiency.

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references

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