dmls制备Haynes 282高温合金的取向依赖性低周疲劳和晶界演化

IF 2 Q3 ENGINEERING, MANUFACTURING

Manufacturing Letters Pub Date : 2025-07-17 DOI:10.1016/j.mfglet.2025.06.206

Mateusz Kopec , Dominika Przygucka , Ryszard Sitek , Stanisław Jóźwiak

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引用次数: 0

摘要

本文研究了直接金属激光烧结在0°、45°和90°条件下，构建取向对Haynes 282合金疲劳性能的影响。疲劳测试表明，由于EBSD识别的等轴晶和高角度晶界，0°和45°取向的使用寿命更长。垂直建筑呈现柱状晶粒，抗疲劳性降低。这项工作首次在dmls制造的Haynes 282中提供了晶界特征和低周疲劳行为之间的系统相关性，扩展了目前对基于inconel系统的理解，并为关键高温应用中基于定向的设计优化提供了见解。

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Orientation-dependent low-cycle fatigue and grain boundary evolution in DMLS-fabricated Haynes 282 superalloy

This study investigates the effect of build orientation on the fatigue performance of Haynes 282 alloy manufactured via Direct Metal Laser Sintering at 0°, 45°, and 90°. Fatigue tests revealed superior service life for 0° and 45° orientations, attributed to equiaxed grains and high-angle grain boundaries identified by EBSD. Vertical builds exhibited columnar grains and reduced fatigue resistance. This work provides the first systematic correlation between grain boundary character and low-cycle fatigue behavior in DMLS-manufactured Haynes 282, expanding current understanding beyond Inconel-based systems and offering insights for orientation-based design optimization in critical high-temperature applications.

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