首页|增材制造高温合金残余应力精确表征和调控

增材制造高温合金残余应力精确表征和调控

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
以激光选区熔化(SLM)增材制造高温合金为研究对象,采用X射线衍射与轮廓法精确表征打印态、喷丸态和热处理态高温合金样品的表面与内部残余应力分布与水平,对比了不同后处理对残余应力分布的影响行为.结果表明:打印态样品表面为拉应力,内部为压应力;拉应力层深度约为2 mm,而且平行增材制造方向上拉应力(1558 MPa)显著高于垂直方向的拉应力(830 MPa).喷丸处理后样品表面形成塑性形变,样品表面拉应力变为压应力(-769 MPa);轮廓法结果发现,压应力深度为0.6 mm,在1 mm深度次表面依然存在较高拉应力,内部压应力降低.热处理后打印态样品表面和内部残余应力几乎完全消除,并在表面形成约150 MPa的压应力.
Accurate characterization and regulation of residual stress in additive manufacturing superalloys
Using selective laser melting(SLM)additive manufacturing of high-temperature alloys,this study employed precise characterization using X-ray diffraction(XRD)and the contour method to analyze the surface and internal residual stress distribution in as-built,shot-peened,and heat-treated high-temperature alloy samples.The results indicate that the surface of as-built samples exhibits the tensile stress,transitioning to internal compressive stress,with depth of approximately 2 mm.Notably,the tensile stress along the parallel additive manufacturing direction(1558 MPa)is significantly higher than the vertical direction(830 MPa).Shot peening induces plastic deformation,transforming surface tensile stress into compressive stress(-769 MPa).The contour method reveals a compressive stress depth of 0.6 mm,with elevated tensile stress at 1 mm depth,while the internal compressive stress decreases.After heat treatment,both surface and internal residual stresses are nearly eliminated,forming a surface compressive stress of approximately 150 MPa.

selective laser meltingnickel-based superalloyresidual stress characterizationshot peeningheat treatmentcontour method

杨帆、李相伟、张瑞尧、张友昭、张涛、Sanjooram PADDEA、张书彦

展开 >

广州大学 物理与材料科学学院,广州 511442

东莞材料基因高等理工研究院,东莞 523808

激光选区熔化 镍基高温合金 残余应力表征 喷丸处理 热处理 轮廓法

国家重点研发计划资助项目广东省基础与应用基础研究基金资助项目广东省基础与应用基础研究基金资助项目

2021YFB37025002020B03010300012020A1515110680

2024

10.11817/j.ysxb.1004.0609.2024-44770

中国有色金属学报
中国有色金属学会

中国有色金属学报

CSTPCD北大核心
影响因子：1.108
ISSN：1004-0609
年,卷(期)：2024.34(9)