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通过增材制造和传统造制造的Inconel 718合金中等温度变形机制的比较研究

Jin Wu¹, Yetao Cheng^1,2, Jinlong Su³

¹State Key Laboratory of Cemented Carbide, College of Materials Science and Engineering, Hunan University, Changsha 410082, China.

Materials (Basel, Switzerland)

|December 11, 2025

概括

增材制造的Inconel 718 (IN718) 由于其固化行为而表现出独特的微观结构特性. 这些差异与造的IN718.18相比,显著影响其热处理反应和中温变形.

科学领域:

材料科学材料科学材料科学
金工业是一种金工业.
增材制造增材制造增材制造

背景情况:

增材制造 (AM) Inconel 718 (IN718) 与传统造的IN718相比,显示出不同的固化行为.
这导致了独特的微观结构和沉反应,影响了热处理和中间温度变形.
了解这些差异对于优化AM IN718性能至关重要.

研究的目的:

系统地比较激光粉床融合 (LPBF) 制造和造IN718合金的中温 (450-750°C) 变形机制.
研究各种热处理条件对这些机制的影响.
阐明三角洲 (δ) 阶段和 (Nb) 分离在LPBF IN718.18中的作用.

主要方法:

对LPBF制造和造的IN718合金进行比较分析.
不同热处理的应用:溶液处理和溶液+老化 (STA).
在中温变形下微观结构的表征和机械性质的评估.

主要成果:

用溶液处理的LPBF IN718显示出细细的柱状颗粒,高脱位密度,并且在颗粒边界保留了 δ 阶段.
造的IN718呈现粗的等粒,在溶液处理后没有d阶段.
STA处理:在LPBF IN718中 δ阶段定粒边界,增强流量应力;造的IN718增强,以γ′′/γ′降水为主.
由于在 δ 阶段消耗了 Nb,LPBF IN718 的 γ′′/γ' 沉物较少,STA 后强度略低.

结论:

在LPBF建造的IN718中,固有的δ相保留和Nb分离极大地影响了其沉行为和抗变形能力.
这些因素使LPBF IN718与传统加工合金区别开来.
为AM制造的高温超级合金中的微结构设计提供了宝贵的见解.

关键词:

在Inconel 718合金中,添加剂制造添加剂制造添加剂制造中间温度变形行为.微观结构的微观结构

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