Surface heterostructuring of 316L stainless steel manufactured by laser powder bed fusion and hot isostatic pressing

被引:3
作者
Kim, Rae Eon [1 ]
Jeong, Sang Guk [2 ]
Ha, Hyojeong [2 ]
Heo, Yoon-Uk [1 ]
Amanov, Auezhan [3 ,4 ]
Gu, Gang Hee [2 ]
Lee, Dong Jun [5 ]
Moon, Jongun [6 ]
Kim, Hyoung Seop [1 ,2 ,7 ,8 ,9 ]
机构
[1] Pohang Univ Sci & Technol POSTECH, Grad Inst Ferrous & Energy Mat Technol, Pohang 37673, South Korea
[2] Pohang Univ Sci & Technol POSTECH, Dept Mat Sci & Engn, Pohang 37673, South Korea
[3] Sun Moon Univ, Dept Mech Engn, Asan 31460, South Korea
[4] Tampere Univ, Fac Engn & Nat Sci, Tampere 33720, Finland
[5] Korea Inst Mat Sci, Aerosp Mat Ctr, 797 Changwondaero, Chang Won 51508, Gyeongnam, South Korea
[6] Kongju Natl Univ, Ctr Adv Powder Mat & Parts, Div Adv Mat Engn, Cheonan 32588, Chungnam, South Korea
[7] Pohang Univ Sci & Technol POSTECH, Ctr Heterogenic Met Addit Mfg, Pohang 37673, South Korea
[8] Tohoku Univ, Adv Inst Mat Res WPI AIMR, Sendai 9808577, Japan
[9] Yonsei Univ, Inst Convergence Res & Educ Adv Technol, Seoul 03722, South Korea
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2024年 / 909卷
基金
新加坡国家研究基金会;
关键词
Laser powder bed fusion; Gradient structure; Heterogeneous materials; Ultrasonic nanocrystal surface modification; Hot isostatic pressure; STACKING-FAULT ENERGY; MECHANICAL-PROPERTIES; BACK STRESS; GRAIN-SIZE; MICROSTRUCTURE; DEFORMATION; BEHAVIOR; STRAIN; STRENGTH; RESISTANCE;
D O I
10.1016/j.msea.2024.146820
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Metal additive manufacturing (AM), offering high freedom of design, has garnered attention as a cutting-edge manufacturing technology. Commonly, hot isostatic pressing (HIP), as post-processing, is utilized to remove undesirable defects in AM parts to obtain fully dense components. However, excessive heating during HIP can result in the deterioration of mechanical properties, limiting their potential for structural industry applications. Herein, we propose a new strategy to obtain an optimized gradient structure to achieve a substantial synergistic effect through ultrasonic nanocrystal surface modification (UNSM) on the HIP-processed AM substrate. The resulting microstructure shows an extended gradient layer reaching the center of the substrate with significant mechanical incompatibility between adjacent domains, showing an excellent combination of strength and ductility. Our study suggests that the optimized gradient structure with superior mechanical properties can be achieved by strategically exploiting HIP-induced effects, which are generally avoided in structural materials due to their deleterious effect on strength.
引用
收藏
页数:16
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