工艺参数对温度和应力场的影响 定向能量沉积 Inconel 690合金合金
Chen Liu1, Yu Zhan2, Hongjian Zhao2
1Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
Materials (Basel, Switzerland)
|March 28, 2024
概括
在Inconel 690合金的增材制造 (AM) 过程中,会产生残余应力. 优化激光功率,停留时间,预热和扫描速度可以减少这些压力,提高元件的精度和可用性.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 制造业 制造技术 制造技术
背景情况:
- 增材制造 (AM) 为复杂的组件提供了设计灵活性.
- 在AM工艺中的高温梯度会引发残余应力,影响组件完整性.
- 在核电应用中,Inconel 690合金至关重要,需要精确的制造.
研究的目的:
- 为了研究工艺参数对Inconel 690.的定向能量沉积 (DED) 过程中温度和残余应力场的影响.
- 建立一个热合机械模型,用于分析Inconel 690的DED.
- 确定最佳的过程参数,以最大限度地减少剩余应力.
主要方法:
- 使用ABAQUS 2019有限元软件开发一个热合机械模型.
- 对Inconel 690合金的定向能量沉积 (DED) 过程的模拟.
- 在不同的工艺参数下分析温度历史和残余应力分布.
主要成果:
- 峰值层温度随着激光功率和预热温度的增加而增加;随着扫描速度和停留时间的减少而降低.
- 基板预热只会显著影响初始层.
- 残余应力集中在特定区域,随着激光功率的增加而增加,随着停留时间的延长而减少.
结论:
- 降低激光功率,增加停留时间,更高的预热和合适的扫描速度可以减少剩余应力.
- 这些发现对于Inconel 690 AM的工艺设计和残余应力调制至关重要.
- 优化的参数提高了Inconel 690元件的精度和可使用性.
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