Effects of TiC nanoparticle additions on microstructure and mechanical properties of FeCrAl alloys prepared by directed energy deposition

doi:10.1016/j.jnucmat.2021.153094

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	Effects of TiC nanoparticle additions on microstructure and mechanical properties of FeCrAl alloys prepared by directed energy deposition
	Lv, W. J.1; Yang, X. S.1; Ji, Y. Q.1; Zhou, Y. Z.1; Li, J. F.1; Liu, X.1; Wang, D.1; Wang, Y.1; Le, G. M.1; Zhao, S. X.2
刊名	JOURNAL OF NUCLEAR MATERIALS
	2021-10
卷号	554
关键词	Additive manufacturing FeCrAl alloys TiC particles Microstructure Mechanical properties
ISSN号	0022-3115
DOI	10.1016/j.jnucmat.2021.153094
英文摘要	Directed energy deposition (DED) additive manufacturing process has been attractive to the fabrications of FeCrAl alloys due to the advantage of near net shaping of complex shaped components. In order to improve the strength, TiC particles strengthened FeCrAl alloys have been fabricated by DED using blended FeCrAl powder and TiC nanoparticles. The results show that the TiC particles in the DED alloys have submicron sizes, and polygonal or dendritic shapes. Most TiC particles are distributed along the dendritic/grain boundaries. The additions of TiC particles effectively refine the grain sizes, and at the same time prompt a columnar to equiaxed transition of grains. The grain sizes are reduced from 1377 mu m to 47 mu m, 21 mu m and 22 mu m when the TiC particle contents in the DED alloys increase from 0 wt% to 0.7 wt%, 2.4 wt% and 3.5 wt%, respectively. The room temperature strength of the FeCrAl alloys increase with the increase of TiC particle content. With 3.5 wt% TiC particle content, the FeCrAl alloy has good mechanical properties with yield strength of 437 MPa, ultimate tensile strength of 688 MPa, and an elongation of 19 %. The 650 degrees C high temperature strength of the FeCrAl alloys first decrease and then increase with the increase of TiC particle content. With 3.5 wt% TiC particle content, the FeCrAl alloy has excellent mechanical properties with yield strength of 208 MPa, ultimate tensile strength of 223 MPa, and an elongation of 53 %. The present study provides an important basis for fabricating high strength particle-strengthened FeCrAl alloys using the DED process. (C) 2021 Elsevier B.V. All rights reserved.
WOS研究方向	Materials Science ; Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000678132000006
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148815]
专题	兰州理工大学
作者单位	1.China Acad Engn Phys, Inst Mat, Mianyang 621908, Sichuan, Peoples R China; 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Lv, W. J.,Yang, X. S.,Ji, Y. Q.,et al. Effects of TiC nanoparticle additions on microstructure and mechanical properties of FeCrAl alloys prepared by directed energy deposition[J]. JOURNAL OF NUCLEAR MATERIALS,2021,554.
APA	Lv, W. J..,Yang, X. S..,Ji, Y. Q..,Zhou, Y. Z..,Li, J. F..,...&Zhao, S. X..(2021).Effects of TiC nanoparticle additions on microstructure and mechanical properties of FeCrAl alloys prepared by directed energy deposition.JOURNAL OF NUCLEAR MATERIALS,554.
MLA	Lv, W. J.,et al."Effects of TiC nanoparticle additions on microstructure and mechanical properties of FeCrAl alloys prepared by directed energy deposition".JOURNAL OF NUCLEAR MATERIALS 554(2021).