首页|Effect of Heat Treatment on Gradient Microstructure and Tensile Property of Laser Powder Bed Fusion Fabricated 15-5 Precipitation Hardening Stainless Steel

Effect of Heat Treatment on Gradient Microstructure and Tensile Property of Laser Powder Bed Fusion Fabricated 15-5 Precipitation Hardening Stainless Steel

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This work investigated the gradient microstructure evolution and tensile property of LPBF fabricated 15-5 precipitation hard-ening stainless steel in post-process direct ageing(DA)and solution treating & ageing(STA).The varied microstructures for austenite and small-sized oxide inclusions at different sample heights in the as-built(AB)condition was generally preserved after DA treatment.However,austenite was almost disappeared,and oxide particle grew significantly after the STA treat-ment.As a result,the tensile property differences in sample top and bottom for AB and DA conditions did not occur in the STA samples.For the influence of post-process heat treatment,the STA condition had the highest yield strength due to the highest volume fraction of nano-sized Cu precipitates.However,the DA specimen had the highest ultimate tensile strength and elongation owing to the considerable amount of austenite phase and associated transformation induced plasticity effect.

15-5 PH stainless steelLaser powder bed fusionHeat treatmentGradient microstructuresTensile properties

Sheng Cao、Hongyu Liu、Jin Jiang、Ke He、Binghua Lv、Hao Zhang、Lujie Zhang、Jingrong Meng、Hao Deng、Xiaodong Niu

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Department of Mechanical Engineering,College of Engineering,Shantou University,Shantou 515063,China

China State Shipbuilding Co.,Ltd.,Huangpu Wenchong Shipbuilding Company Ltd.,Guangzhou 510715,China

Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100080,China

Shantou Ruixiang Mould Co.,Ltd.,Shantou 515041,China

Military Representative Office X of Unit 93147,Deyang 618000,China

China National Erzhong Group Co.,Deyang Wanhang Die Forging Co.,Ltd.,Deyang 618013,China

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国家自然科学基金Special Fund Project for Science and Technology Innovation Strategy of Guangdong ProvinceSpecial Fund Project for Science and Technology Innovation Strategy of Guangdong ProvinceCharacteristic Innovation Project(Natural Science)for Regular University in Guangdong ProvinceShantou University Research Foundation for Talents

52204391STKJ202209021STKJ20230402022KTSCX038NTF21013

2024

10.1007/s40195-023-01635-3

金属学报(英文版)
中国金属学会

金属学报(英文版)

CSTPCD
影响因子：0.77
ISSN：1006-7191
年,卷(期)：2024.37(1)
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