热等静压对镍基单晶超合金微米级残余应力的影响

IF 11.2 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Haoyi Niu, Zhuangzhuang Liu, Hao Wang, Hao Wu, Qing Liu, Guohua Fan
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引用次数: 0

摘要

量化微米尺度的残余应力对于理解跨晶粒和晶粒间变形机制以及热处理的影响至关重要,但在技术上仍具有挑战性。本研究利用聚焦离子束和数字图像相关(FIB-DIC)技术来评估镍基单晶超合金枝晶杆和臂内的残余应力。此外,还阐明了热等静压(HIP)对微观结构和残余应力的影响。我们的研究结果表明,枝晶杆和臂区域的残余应力表现为沿 x 轴的拉应力和沿 y 轴的压应力,范围在 -720 兆帕至 680 兆帕之间。HIP 处理可有效改善镍基单晶超合金的微观结构并调节残余应力,从而快速降低残余应力水平。本研究为优化加工策略以调节残余应力和提高下一代单晶超合金的机械性能奠定了坚实的理论基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effects of hot isostatic pressing on the micron-scale residual stress of nickel-based single-crystal superalloys

Effects of hot isostatic pressing on the micron-scale residual stress of nickel-based single-crystal superalloys
Quantifying the residual stress at micron-scale is crucial for comprehending the trans- and inter-granular deformation mechanisms and the influence of heat treatment, but remains technically challenging. This study utilized focused ion beam and digital image correlation (FIB-DIC) techniques to assess residual stress within the dendrite stem and arm of nickel-based single-crystal superalloys. The influence of hot isostatic pressing (HIP) on the microstructure and residual stress was also elucidated. Our results revealed that the residual stresses in the dendrite stem and arm regions manifest as tensile stress along the x-axis and compressive stress along the y-axis, with a range of -720 MPa to 680 MPa. HIP treatment effectively improved microstructure and regulated residual stress in nickel-based single-crystal superalloys, leading to a rapid reduction in residual stress levels. The present study lays a solid theoretical groundwork for optimizing processing strategies to regulate residual stress and enhance mechanical properties in next-generation single-crystal superalloys.
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来源期刊
Journal of Materials Science & Technology
Journal of Materials Science & Technology 工程技术-材料科学:综合
CiteScore
20.00
自引率
11.00%
发文量
995
审稿时长
13 days
期刊介绍: Journal of Materials Science & Technology strives to promote global collaboration in the field of materials science and technology. It primarily publishes original research papers, invited review articles, letters, research notes, and summaries of scientific achievements. The journal covers a wide range of materials science and technology topics, including metallic materials, inorganic nonmetallic materials, and composite materials.
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