Mechanism of Decrease in Impact Toughness in a Low-Carbon MnCrMoNiCu Plate Steel with Increasing Austenitizing Temperature

doi:10.1007/s11665-018-3591-4

	Mechanism of Decrease in Impact Toughness in a Low-Carbon MnCrMoNiCu Plate Steel with Increasing Austenitizing Temperature
	Luo, Mi 1; Liu, Dongsheng 1; Cheng, Binggui 1; Cao, Rui 2,3; Chen, Jianhong 2,3
刊名	JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
	2018-09
卷号	27 期号:9 页码:4855-4870
关键词	austenitizing temperature cleavage fracture stress impact toughness mechanism packet size
ISSN号	1059-9495
DOI	10.1007/s11665-018-3591-4
英文摘要	In order to reveal how microscopic factors affect the toughness and the occurrence of cleavage fracture of a low-carbon MnCrMoNiCu alloyed steel, a series of thermal treatments was performed on the steel employing a thermomechanical simulator. These involved reheating samples at different temperatures (950-1250 degrees C), producing different prior austenite sizes, followed by a continuous cooling transformation process. The Charpy V-notch toughness was determined, and the effect of austenite grain size on the ductile-to-brittle transition temperatures of the steel was investigated. The microstructural evolution on the austenite sizes was studied, fracture features were characterized, the critical event for cleavage fracture was identified, and the local cleavage fracture stress sigma(f) was calculated. The impact toughness decreased as the austenitizing temperature increased. A quantitative relationship between sigma(f) and the size of the initial cleavage fracture facet (microcrack nucleus) a(f) in the lathy martensite+bainite microstructure has been developed.
WOS研究方向	Materials Science
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000443966400049
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32483]
专题	材料科学与工程学院
通讯作者	Liu, Dongsheng
作者单位	1.Jiangsu Shagang Co Ltd, Inst Res Iron & Steel, Zhangjiagang City 215625, Jiangsu, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Gansu Adv Proc & Recycling Nonferro, Minist Educ, Lanzhou 730050, Gansu, Peoples R China 3.Lanzhou Univ Technol, Key Lab Nonferrous Met Alloys, Minist Educ, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Luo, Mi,Liu, Dongsheng,Cheng, Binggui,et al. Mechanism of Decrease in Impact Toughness in a Low-Carbon MnCrMoNiCu Plate Steel with Increasing Austenitizing Temperature[J]. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,2018,27(9):4855-4870.
APA	Luo, Mi,Liu, Dongsheng,Cheng, Binggui,Cao, Rui,&Chen, Jianhong.(2018).Mechanism of Decrease in Impact Toughness in a Low-Carbon MnCrMoNiCu Plate Steel with Increasing Austenitizing Temperature.JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,27(9),4855-4870.
MLA	Luo, Mi,et al."Mechanism of Decrease in Impact Toughness in a Low-Carbon MnCrMoNiCu Plate Steel with Increasing Austenitizing Temperature".JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 27.9(2018):4855-4870.