Effect of heat treatment on the microstructure and tensile properties of a new superalloy designed for additive manufacturing

doi:10.1016/j.msea.2022.144023

IMR OpenIR

	Effect of heat treatment on the microstructure and tensile properties of a new superalloy designed for additive manufacturing
	Wu, Bin 1,2; Liang, Jingjing 2,3; Zhou, Yizhou 2; Yang, Yanhong 2,3; Li, Jinguo 2,3; Sun, Xiaofeng 2
通讯作者	Liang, Jingjing(jjliang@imr.ac.cn)
	2022-10-20
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	856 页码:12
摘要	The microstructures and tensile properties of a novel superalloy especially designed for additive manufacturing (AM) were investigated under four states: (1) AD (as-deposited), the state of part after LMD (laser metal depo-sition); (2) HT1, heat treated at 870 degrees C for 16 h + air cooling; (3) HT2, heat treated at 1080 degrees C for 4 h + air cooling; (4) HT3, heat treated at 1080 degrees C for 4 h + air cooling, then heat treated at 870 degrees C for 16 h + air cooling (HT2+HT1). Each of them were extracted from the vertical (V) and horizontal (H) section of the part, respec-tively. Methods such as OM, SEM, TEM, XRD and unidirectional tensile tests were used for the investigation. The AD sample displays cellular dendrite microstructures with <001> crystal direction parallel to the building di-rection. The major phases are gamma/gamma'; while the minor phases are fine MC and Laves with no more than 1% in volume fraction. The size of primary gamma ' ranges from 100 nm to 150 nm, the secondary gamma ' particles are no more than 30 nm. With the aid of calculation, the processing HT1 and HT2 are confirmed as ageing and sub-solution treatment, respectively. The former raised the volume fraction of gamma ' from 30.93% (AD) to 48.57% (HT1), and raised the size of gamma ' at the expense of dissolving the secondary gamma ' particles. The latter didn't change the volume fraction of gamma ' strikingly, but refined the gamma ' with the exception of a small amount of extraordinary large particles in the interdendritic region (IR). HT3 is a two-stage processing (HT2+HT1) which increased the volume fraction of gamma ' slightly but raised the size apparently. The value of ultimate tensile strength (UTS) and yield strength (YS) of vertical samples are superior to that of the horizontal. The HT1-V shows the best UTS and poor Elongation (UTS, 1082 MPa; EL, 35.28%), while the AD-V has excellent strength and ductility match (UTS, 1054 MPa; YS, 744 MPa; EL, 50.45%); The best ductility is found among samples of HT3 (EL, 62.1% for HT3-H). The samples of HT2-H are inferior in both strength and ductility, and the obtained properties are scattered. These investigation results provide important fundamental support for optimizing the procedure, microstructure and properties of the new alloy in the future application research.
关键词	Laser metal deposition Additive manufacturing Heat treatment Microstructure Tensile
资助者	National Science and Technology Major Project of China
DOI	10.1016/j.msea.2022.144023
收录类别	SCI
语种	英语
资助项目	National Science and Technology Major Project of China ; [Y2019 -VII -0011-0151]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000875762400001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/176373
专题	中国科学院金属研究所
通讯作者	Liang, Jingjing
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shi changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 3.CAS Key Lab, Space Mfg Technol, Beijing 100094, Peoples R China
推荐引用方式 GB/T 7714	Wu, Bin,Liang, Jingjing,Zhou, Yizhou,et al. Effect of heat treatment on the microstructure and tensile properties of a new superalloy designed for additive manufacturing[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,856:12.
APA	Wu, Bin,Liang, Jingjing,Zhou, Yizhou,Yang, Yanhong,Li, Jinguo,&Sun, Xiaofeng.(2022).Effect of heat treatment on the microstructure and tensile properties of a new superalloy designed for additive manufacturing.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,856,12.
MLA	Wu, Bin,et al."Effect of heat treatment on the microstructure and tensile properties of a new superalloy designed for additive manufacturing".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 856(2022):12.