Experimental investigation on the deformation behavior of an isotropic 304L austenitic steel manufactured by laser powder bed fusion with hot isostatic pressing

doi:10.1016/j.matchar.2024.114086

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Experimental investigation on the deformation behavior of an isotropic 304L austenitic steel manufactured by laser powder bed fusion with hot isostatic pressing
	Zhang, Hongzhuang 3; Li, Bing 3; Hu, Jiexin 2; Qian, Guian 1; Li, Changyou 3
刊名	MATERIALS CHARACTERIZATION
	2024-08-01
卷号	214 页码:19
关键词	Laser powder bed fusion Hot isostatic pressing Austenitic steel Microstructural observation Deformation behavior Twinning mechanism
ISSN号	1044-5803
DOI	10.1016/j.matchar.2024.114086
通讯作者	Zhang, Hongzhuang(zhanghz@mail.neu.edu.cn) ; Qian, Guian(qianguian@imech.ac.cn)
英文摘要	Post-heat treatment, such as hot isostatic pressing (HIP), is increasingly employed in laser powder bed fused (LPBF) metallic materials to release residual stress, alleviate microstructural anisotropy, and tailor mechanical properties. Here, we systematically investigate the initial and deformed microstructures of as-received and HIPed L-PBF 304L austenitic steel using various microstructural characterizations. The results indicate that the HIP procedure can decrease the porosity and generate the columnar-to-equiaxed transition (CET), resulting in an isotropic microstructural morphology better suitable for practice applications. Additionally, the HIP samples have exceptional ductility when compared to as-received samples, which is associated with the sustained strain hardening rate arising from the notable deformation twinning behavior. The majority of deformation twins are preferentially emitted from the straight annealing twin boundaries and then grow within the < 111 > - oriented annealing twins. The principle twinning mechanism involved is the twinning partial emission from the annealing twin boundaries or high-angle grain boundaries (HAGBs). Moreover, the inclusions distributed near/on the annealing twin boundaries can emit partials with multiple Burgers vectors during straining, resulting in the extra random activation of partials (RAP) twinning mechanism that sustains the deformation process. These findings give helpful suggestions for HIP process designs of L-PBF austenitic steels, as well as a solid foundation for future theoretical modeling research.
资助项目	State Key Laboratory of Nonlinear Mechanics ; National Natural Science Foundation of China[12272090] ; Joint Fund of Natural Science Foundation of Liaoning Province[2023-BSBA-138] ; Fundamental Research Funds for the Central Universities[N2403024]
WOS关键词	STAINLESS-STEEL ; MECHANICAL-PROPERTIES ; INDUCED-PLASTICITY ; HIGH-STRENGTH ; ALUMINUM ; MICROSTRUCTURE ; ORIENTATION ; DEPENDENCE ; DUCTILITY ; STRESS
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:001258665500001
资助机构	State Key Laboratory of Nonlinear Mechanics ; National Natural Science Foundation of China ; Joint Fund of Natural Science Foundation of Liaoning Province ; Fundamental Research Funds for the Central Universities
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/95808]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Zhang, Hongzhuang; Qian, Guian
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China 2.China Inst Marine Technol & Econ, Ship Standardizat Res Ctr, Beijing 100081, Peoples R China 3.Northeastern Univ, Sch Mech Engn & Automat, Shenyang 110819, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Hongzhuang,Li, Bing,Hu, Jiexin,et al. Experimental investigation on the deformation behavior of an isotropic 304L austenitic steel manufactured by laser powder bed fusion with hot isostatic pressing[J]. MATERIALS CHARACTERIZATION,2024,214:19.
APA	Zhang, Hongzhuang,Li, Bing,Hu, Jiexin,Qian, Guian,&Li, Changyou.(2024).Experimental investigation on the deformation behavior of an isotropic 304L austenitic steel manufactured by laser powder bed fusion with hot isostatic pressing.MATERIALS CHARACTERIZATION,214,19.
MLA	Zhang, Hongzhuang,et al."Experimental investigation on the deformation behavior of an isotropic 304L austenitic steel manufactured by laser powder bed fusion with hot isostatic pressing".MATERIALS CHARACTERIZATION 214(2024):19.