Effects of Orthogonal Heat Treatment on Microstructure and Mechanical Properties of GN9 Ferritic/Martensitic Steel

doi:10.1186/s10033-023-00984-5

IMR OpenIR

	Effects of Orthogonal Heat Treatment on Microstructure and Mechanical Properties of GN9 Ferritic/Martensitic Steel
	Ma, Tingwei 1,2; Hao, Xianchao 3; Wang, Ping 1
通讯作者	Hao, Xianchao(xchao@imr.ac.cn) ; Wang, Ping(wping@epm.neu.edu.cn)
	2023-12-19
发表期刊	CHINESE JOURNAL OF MECHANICAL ENGINEERING
ISSN	1000-9345
卷号	36 期号:1 页码:12
摘要	Microstructure and mechanical properties of GN9 Ferritic/Martensitic steel for sodium- cooled fast reactors have been investigated through orthogonal design and analysis. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), differential scanning calorimeter (DSC), tensile and impact tests were used to evaluate the heat treatment parameters on yield strength, elongation and ductile-to-brittle transition temperature (DBTT). The results indicate that the microstructures of GN9 steel after orthogonal heat treatments consist of tempered martensite, M23C6, MX carbides and MX carbonitrides. The average prior austenite grains increase and the lath width decreases with the austenitizing temperature increasing from 1000 degrees C to 1080 degrees C. Tempering temperature is the most important factor that influences the dislocation evolution, yield strength and elongation compared with austenitizing temperature and cooling methods. Austenitizing temperature, tempering temperature and cooling methods show interactive effects on DBTT. Carbide morphology and distribution, which is influenced by austenitizing and tempering temperatures, is the critical microstructural factor that influences the Charpy impact energy and DBTT. Based on the orthogonal design and microstructural analysis, the optimal heat treatment of GN9 steel is austenitizing at 1000 degrees C for 0.5 h followed by air cooling and tempering at 760 degrees C for 1.5 h.
关键词	Ferritic/Martensitic steel Orthogonal design M23C6 carbide Ductile-to-brittle transition temperature
资助者	Natural Science Foundation Guidance Plan of Liaoning Province
DOI	10.1186/s10033-023-00984-5
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation Guidance Plan of Liaoning Province
WOS研究方向	Engineering
WOS类目	Engineering, Mechanical
WOS记录号	WOS:001126996600002
出版者	SPRINGER
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/183093
专题	中国科学院金属研究所
通讯作者	Hao, Xianchao; Wang, Ping
作者单位	1.Northeastern Univ, Key Lab Electromagnet Proc Mat, Minist Educ, Shenyang 110004, Peoples R China 2.Yingkou Inst Technol, Yingkou 115014, Peoples R China 3.Chinese Acad Sci, CAS Key Lab Nucl Mat & Safety Assessment, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Ma, Tingwei,Hao, Xianchao,Wang, Ping. Effects of Orthogonal Heat Treatment on Microstructure and Mechanical Properties of GN9 Ferritic/Martensitic Steel[J]. CHINESE JOURNAL OF MECHANICAL ENGINEERING,2023,36(1):12.
APA	Ma, Tingwei,Hao, Xianchao,&Wang, Ping.(2023).Effects of Orthogonal Heat Treatment on Microstructure and Mechanical Properties of GN9 Ferritic/Martensitic Steel.CHINESE JOURNAL OF MECHANICAL ENGINEERING,36(1),12.
MLA	Ma, Tingwei,et al."Effects of Orthogonal Heat Treatment on Microstructure and Mechanical Properties of GN9 Ferritic/Martensitic Steel".CHINESE JOURNAL OF MECHANICAL ENGINEERING 36.1(2023):12.