用多目标方法优化L-PBF工艺参数,以减少Ni-Cr-Mo-Nb超合金的缺陷和机械强度
Anton V Agapovichev1,2, Alexander I Khaimovich1, Vitaliy G Smelov1
1Engine Production Technology Department, Samara National Research University, 34 Moskovskoye Shosse, 443086 Samara, Russia.
Materials (Basel, Switzerland)
|May 7, 2025
概括
这项研究优化了激光粉床融合 (L-PBF) 超级合金使用三阶段方法. 综合方法有效地确定了优质机械性能和无缺陷材料的最佳参数.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 增材制造 增材制造 增材制造
背景情况:
- 在增材制造 (AM) 中优化工艺参数,特别是激光粉床融合 (L-PBF),对于生产密集,无缺陷的超级合金至关重要.
- 基于Ni-Cr-Mo-Nb的超级合金对于高性能应用至关重要,要求精确的制造控制.
研究的目的:
- 为基于Ni-Cr-Mo-Nb的超级合金优化L-PBF过程参数.
- 开发一种综合方法,以有效地进行材料表征和减少缺陷.
主要方法:
- 一种综合的三阶段方法,结合了灰色关系分析 (GRA),响应表面方法 (RSM) 和梯度上升方法 (GAM).
- GRA确定了有利的参数集,RSM开发了包括层融合的特定能量在内的预测模型,GAM通过一个可取性函数确定了全球最佳值.
主要成果:
- 实现了最佳的机械性能:屈服强度 (774.73 ± 4.94 MPa),拉伸强度 (1022.83 ± 5.19 MPa) 和破裂时的延伸 (23.1 ± 0.70%).
- 尽量减少缺陷,具有最小的融化损失 (LoF) 面积 (0.003 mm2) 和气孔直径 (0.02 mm).
- 综合方法显著减少了所需的实验试验的数量.
结论:
- 集成的GRA,RSM和GAM方法有效地确定了Ni-Cr-Mo-Nb超级合金L-PBF的最佳加工窗口.
- 这种方法加快了材料表征,并确保了高质量,无缺陷的部件,增强了机械性能.
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