The Customized Heat Treatment for Enhancing the High-Temperature Durability of Laser-Directed Energy Deposition-Repaired Single-Crystal Superalloys

被引：2
作者：
Guo, Yimo [1 ,2 ]
Lu, Nannan [2 ]
Yang, Pengfei [1 ,2 ]
Liang, Jingjing [2 ]
Zhang, Guangrui [2 ]
Cui, Chuanyong [2 ]
Zhang, Ting-An [3 ]
Zhou, Yizhou [2 ]
Sun, Xiaofeng [2 ]
Li, Jinguo [2 ]
机构：
[1] Northeastern Univ, Sch Mat & Engn, Shenyang 110819, Peoples R China
[2] Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China
[3] Northeastern Univ, Key Lab Ecol Utilizat Multimet Mineral, Minist Educ, Shenyang 110819, Peoples R China
来源：
MATERIALS | 2024年 / 17卷 / 22期
基金：
中国博士后科学基金;
关键词：
single-crystal superalloy; directed energy deposition; heat treatment; microstructure; high-temperature durability; microporous fracture; NICKEL-BASE SUPERALLOYS; STRAY GRAIN FORMATION; MECHANICAL-PROPERTIES; EQUIAXED TRANSITION; TENSILE PROPERTIES; INCONEL; 718; MICROSTRUCTURE; DEFORMATION; DEPENDENCE; CRACKING;
D O I：
10.3390/ma17225665
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The high-temperature durability performance plays a crucial role in the applications of single-crystal (SX) superalloys repaired by laser-directed energy deposition (L-DED). A specialized heat treatment process for L-DED-repaired SX superalloys was developed in this study. The effect of the newly customized heat treatment on the microstructure and high-temperature mechanical properties of DD32 SX superalloy repaired by L-DED was investigated. Results indicate that the repaired area of the newly customized heat treatment specimen still maintained a SX structure, the average size of the gamma ' phase was 236 nm, and the volume fraction was 69%. Obviously recrystallized grains were formed in the repair area of the standard heat treatment specimens, and carbide precipitated along the grain boundary. The size of the gamma ' phase was about 535 nm. The high-temperature durable life of the newly custom heat treatment specimen was about 19.09 h at 1000 degrees C/280 MPa, the fracture mode was microporous aggregation fracture, and the fracture location was in the repair area. The durable life of the standard heat treatment specimen was about 8.70 h, the fracture mode was cleavage fracture, and the fracture location was in the matrix area. The crack source of both specimens was interdendrite carbide.
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页数：15
相关论文
共 57 条
[1]  
Anderson TD, 2011, WELD J, V90, p27S
[2]   Joining of nickel base superalloy single crystals [J].
Babu, SS ;
David, SA ;
Park, JW ;
Vitek, JM .
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2004, 9 (01) :1-12
[3]   Hardness and microstructure homogeneity of pure copper processed by accumulative back extrusion [J].
Bazaz, B. ;
Zarei-Hanzaki, A. ;
Fatemi-Varzaneh, S. M. .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2013, 559 :595-600
[4]   Microstructure and tensile properties of superalloy IN100 fabricated by micro-laser aided additive manufacturing [J].
Bi, Guijun ;
Sun, Chen-Nan ;
Chen, Hui-chi ;
Ng, Fern Lan ;
Ma, Cho Cho Khin .
MATERIALS & DESIGN, 2014, 60 :401-408
[5]  
Bian H., 2018, Appl. Laser, V38, P741
[6]  
Bian H., 2017, J. Mater. Heat Treat, V38, P72
[7]  
Bian H., 2015, Chin. J. Lasers, V42, P67
[8]   How evolving multiaxial stress states affect the kinetics of rafting during creep of single crystal Ni-base superalloys [J].
Cao, L. ;
Wollgramm, P. ;
Buerger, D. ;
Kostka, A. ;
Cailletaud, G. ;
Eggeler, G. .
ACTA MATERIALIA, 2018, 158 :381-392
[9]   Comparison of single crystal Ni based superalloy repair by gas tungsten arc and electron beam processes [J].
Churchman, C. ;
Bonifaz, E. A. ;
Richards, N. L. .
MATERIALS SCIENCE AND TECHNOLOGY, 2011, 27 (04) :811-817
[10]  
Ci S., 2021, Study on microstructure and mechanical properties of Nickel-based single crystal superalloy fabricated by laser additive
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