Preferential distribution behavior of B and its enhancement on creep strength of alumina-forming austenitic heat-resistant steel

doi:10.1016/j.matchar.2023.113357

IMR OpenIR

	Preferential distribution behavior of B and its enhancement on creep strength of alumina-forming austenitic heat-resistant steel
	Shu, Ming 1,2; Zhou, Qin 2; Li, Gang 1; Liang, Xue 3; Ming, Hongliang 4; Sun, Yongduo 1; Lin, Xiaodong 3; Xiao, Jun 1
通讯作者	Zhou, Qin(qinzhou@tsinghua.edu.cn)
	2023-11-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	205 页码:12
摘要	The addition of a trace amount of 20 ppm B significantly enhanced the creep performance of the 2.5Al-AFA alloy at 650 degrees C, demonstrating sustained improvement even after prolonged thermal aging. Boron (B) preferentially distributed in the Laves phase within the matrix, rather than in the NiAl or Cr -rich phases. APT analysis revealed M23C6 may serve as a reservoir of B, gradually allowing B diffusing into the surrounding Laves phase at grain boundaries (GBs). Creep cracks propagated mainly along GBs, with the a phase serving as initiation sites. The average volume fraction of a phase exhibited a linear correlation with the reciprocal of creep rupture time. B accelerated the precipitation of Laves with a larger size and higher volume fraction, which played a dual role of improved GB strengthening and more effective suppression of a phase growth.
关键词	AFA Boron Laves phase APT Creep Thermal aging
资助者	Special Funds for the Key Research and Development Program of the Ministry of Science and Technology of China ; Natural Science Founda-tion of Sichuan Province
DOI	10.1016/j.matchar.2023.113357
收录类别	SCI
语种	英语
资助项目	Special Funds for the Key Research and Development Program of the Ministry of Science and Technology of China[2020YFB1901800] ; Natural Science Founda-tion of Sichuan Province[2022NSFSC1191]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:001089919000001
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：1[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/321006/177913
专题	中国科学院金属研究所
通讯作者	Zhou, Qin
作者单位	1.Nucl Power Inst China, Chengdu 610213, Peoples R China 2.Tsinghua Univ, Inst Nucl & New Energy Technol, Beijing 100084, Peoples R China 3.Shanghai Univ, Lab Microstruct, Shanghai 200444, Peoples R China 4.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Shu, Ming,Zhou, Qin,Li, Gang,et al. Preferential distribution behavior of B and its enhancement on creep strength of alumina-forming austenitic heat-resistant steel[J]. MATERIALS CHARACTERIZATION,2023,205:12.
APA	Shu, Ming.,Zhou, Qin.,Li, Gang.,Liang, Xue.,Ming, Hongliang.,...&Xiao, Jun.(2023).Preferential distribution behavior of B and its enhancement on creep strength of alumina-forming austenitic heat-resistant steel.MATERIALS CHARACTERIZATION,205,12.
MLA	Shu, Ming,et al."Preferential distribution behavior of B and its enhancement on creep strength of alumina-forming austenitic heat-resistant steel".MATERIALS CHARACTERIZATION 205(2023):12.