材料科学技术(英文版)2022，Vol.128Issue(33) ：10-21.

Hybrid post-processing effects of magnetic abrasive finishing and heat treatment on surface integrity and mechanical properties of additively manufactured Inconel 718 superalloys

Kun Li Ruijin Ma Ming Zhang Wen Chen Xiaobin Li David Z.Zhang Qian Tang Lawrence E.Murr Jinfeng Li Huajun Cao
材料科学技术(英文版)2022，Vol.128Issue(33) ：10-21.
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Hybrid post-processing effects of magnetic abrasive finishing and heat treatment on surface integrity and mechanical properties of additively manufactured Inconel 718 superalloys

Kun Li 1Ruijin Ma 2Ming Zhang 2Wen Chen 2Xiaobin Li 2David Z.Zhang 3Qian Tang 1Lawrence E.Murr 4Jinfeng Li 5Huajun Cao2
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作者信息

  • 1. State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400044,China;Chongqing Key Laboratory of Metal Additive Manufacturing(3D Printing),Chongqing University,Chongqing 400044,China
  • 2. State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400044,China
  • 3. State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400044,China;Chongqing Key Laboratory of Metal Additive Manufacturing(3D Printing),Chongqing University,Chongqing 400044,China;College of Engineering,Mathematics and Physical Sciences,University of Exeter,North Park Road,Exeter EX4 4QF,UK
  • 4. W.M.Keck Center for 3D Innovation,University of Texas at El Paso,El Paso,TX 79968,USA;Department of Metallurgical,Materials and Biomedical Engineering,University of Texas at El Paso,El Paso,TX 79968,USA
  • 5. Institute of Materials,China Academy of Engineering Physics,Mianyang 621908,China
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Abstract

Desired microstructure and surface integrity are critical to achieving the high performance of addi-tively manufactured components.In the present work,the hybrid post-processes of magnetic abra-sive finishing(MAF)and post-heat treatment(HT)were applied to the additively manufactured Inconel 718 superalloys.Their hybrid effects and influencing mechanism on the surface quality and mechan-ical properties of the additively manufactured samples have been studied comparatively.The results show that the MAF process effectively reduces the surface roughness by more than an order of mag-nitude due to the flexibility and geometric consistency of the magnetic particles and abrasives with the finished surfaces.The proper sequence of MAF and HT obtains enhanced mechanical properties for the homogenized-MAF-aged sample with the yield strength of 1147 MPa,the ultimate tensile strength of 1334 MPa,and the elongation of 22.9％,which exceeds the standard wrought material.The sur-face integrity,compressive residual stress field,and grain refinement induced by the MAF and subse-quent aging heat treatment increase the cracking resistance and delay the fracture failure,which sig-nificantly benefits the mechanical properties.The MAF process combined with proper post-heat treat-ment provides an effective pathway to improve the mechanical properties of additively manufactured materials.

Key words

Magnetic abrasive finishing/Additive manufacturing/Inconel 718/Microstructure-property relationship/Heat treatment

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基金项目

中央高校基本科研业务费专项(2021CDJQY-024)

Research Project from Chongqing Key Laboratory of Metal Additive Manufacturing(3D Printing)in Chongqing University(02090011044158)

国家自然科学基金(51975073)

出版年

2022
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
参考文献量55
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