Enhancement of the strength-toughness balance in a quenched laser-additively-manufactured low alloy mild steel: Effect of grain refinement and nanotwin bundle formation

doi:10.1016/j.msea.2022.144488

IMR OpenIR

	Enhancement of the strength-toughness balance in a quenched laser-additively-manufactured low alloy mild steel: Effect of grain refinement and nanotwin bundle formation
	Zhang, W.1,2,3; Dong, Z. H.3; Shang, X.1; Chen, S. G.1,4; Zhang, L. J.1; Peng, X.5
通讯作者	Peng, X.(xpeng@nchu.edu.cn)
	2023-01-18
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	862 页码:9
摘要	A laser additively manufactured (LAM) ferrite-austenite low-alloy mild 12CrNi2 has a low ultimate tensile strength but a larger elongation. To improve the strength but without compromising the toughness, a concept to martensitize the low alloy mild steel with introducing nanotwin bundles into the martensitic laths is proposed, through deliberately-designed cyclic quenching (CQ). It is found that the prior austenitic grain refinement helps to form a fine-grained martensite (alpha ' ) constituted of the laths with the formation of {112}<111> type nanotwin bundles. The steel with such a nanotwinned martensite structure, in comparison to the steel counterpart with a dislocated lath martensitic structure obtained through conventional direct quenching (DQ), is enhanced not only in ultimate tensile strength, but also in elongation. The mechanism for the nanotwin bundles formation is interpreted in connection with the grain-refinement-induced decrease in martensitic transformation starting temperature (Ms).
关键词	Laser melting deposition Lath martensite Nanotwin bundle Mechanical property Low alloy mild steel
资助者	Guang Dong major Project of Basic and Applied Basic Research Foundation ; National Key Research and Development of China ; Key-Area Research and Development Program of Guangdong Province ; Dongguan Sci-tech Commissoner
DOI	10.1016/j.msea.2022.144488
收录类别	SCI
语种	英语
资助项目	Guang Dong major Project of Basic and Applied Basic Research Foundation ; National Key Research and Development of China ; Key-Area Research and Development Program of Guangdong Province ; Dongguan Sci-tech Commissoner ; [2020B030103001] ; [2016YFB1100203] ; [2020B090924002] ; [20211800500102]
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:000904312300002
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：4[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/321006/175757
专题	中国科学院金属研究所
通讯作者	Peng, X.
作者单位	1.Dong Guan Univ Technol, Inst Sci &Technol Innovat, Dong Guan 523000, Peoples R China 2.Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300350, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Liaoning, Peoples R China 4.Guangzhou Panyu Polytech, Sch Art & Design, Guangzhou 511483, Peoples R China 5.Nanchang Hangkong Univ, Sch Mat Sci & Engn, Nanchang 330063, Jiangxi, Peoples R China
推荐引用方式 GB/T 7714	Zhang, W.,Dong, Z. H.,Shang, X.,et al. Enhancement of the strength-toughness balance in a quenched laser-additively-manufactured low alloy mild steel: Effect of grain refinement and nanotwin bundle formation[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2023,862:9.
APA	Zhang, W.,Dong, Z. H.,Shang, X.,Chen, S. G.,Zhang, L. J.,&Peng, X..(2023).Enhancement of the strength-toughness balance in a quenched laser-additively-manufactured low alloy mild steel: Effect of grain refinement and nanotwin bundle formation.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,862,9.
MLA	Zhang, W.,et al."Enhancement of the strength-toughness balance in a quenched laser-additively-manufactured low alloy mild steel: Effect of grain refinement and nanotwin bundle formation".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 862(2023):9.