材料科学技术(英文版)2024，Vol.187Issue(20) ：86-100.DOI:10.1016/j.jmst.2023.11.033

Microstructure evolution and strengthening mechanisms of a high-performance TiN-reinforced Al-Mn-Mg-Sc-Zr alloy processed by laser powder bed fusion

Hao Tang Xiaoying Xi Chaofeng Gao Zhongqiang Liu Jiantao Zhang Weiwen Zhang Zhiyu Xiao Jeremy Heng Rao
材料科学技术(英文版)2024，Vol.187Issue(20) ：86-100.DOI:10.1016/j.jmst.2023.11.033
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Microstructure evolution and strengthening mechanisms of a high-performance TiN-reinforced Al-Mn-Mg-Sc-Zr alloy processed by laser powder bed fusion

Hao Tang 1Xiaoying Xi 1Chaofeng Gao 2Zhongqiang Liu 3Jiantao Zhang 1Weiwen Zhang 1Zhiyu Xiao 1Jeremy Heng Rao2
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作者信息

  • 1. National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials,South China University of Technology,Guangzhou 510641,China
  • 2. Institute of Advanced Additive Manufacturing,Ji Hua Laboratory,Foshan 528000,China
  • 3. National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials,South China University of Technology,Guangzhou 510641,China;Well Technology Company Limited,Foshan 528225,China
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Abstract

In this work,a high-strength crack-free TiN/Al-Mn-Mg-Sc-Zr composite was fabricated by laser powder bed fusion(L-PBF).A large amount of uniformly distributed L12-Al3(Ti,Sc,Zr)nanoparticles were formed during the L-PBF process due to the partial melting and decomposition of TiN nanoparticles under a high temperature.These L12-Al3(Ti,Sc,Zr)nanoparticles exhibited a highly coherent lattice relationship with the Al matrix.All the prepared TiN/Al-Mn-Mg-Sc-Zr composite samples exhibit ultrafine grain mi-crostructure.In addition,the as-built composite containing 1.5 wt％TiN shows an excellent tensile prop-erty with a yield strength of over 580 MPa and an elongation of over 8％,which were much higher than those of wrought 7xxx alloys.The effects of various strengthening mechanisms were quantitatively estimated and the high strength of the alloy was mainly attributed to the refined microstructure,solid solution strengthening,and precipitation strengthening contributed by L12-Al3(Ti,Sc,Zr)nanoparticles.

Key words

Laser powder bed fusion/Aluminum matrix composites/Heterogeneous nucleation/Strengthening mechanisms/Mechanical performance

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基金项目

National Natural Science Foundation of China(52274363)

Guangdong Basic Applied Basic Research Foundation,China(2022A1515010558)

Guangdong Basic Applied Basic Research Foundation,China(2022A1515011597)

Guangdong Basic Applied Basic Research Foundation,China(2022A1515240065)

Natural Science Foundation Project of Guangzhou,China(202201010526)

出版年

2024
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)

CSTPCDCSCD
影响因子：0.657
ISSN：1005-0302
参考文献量74
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