Effects of phosphorus and boron on the γ " precipitate evolution and creep properties of IN718 superalloy during long-term thermal exposure at 680 °C

doi:10.1016/j.jallcom.2024.174743

IMR OpenIR

	Effects of phosphorus and boron on the γ " precipitate evolution and creep properties of IN718 superalloy during long-term thermal exposure at 680 °C
	Wang, Zhiyuan 1,2; Xue, Chaochao 3; Liu, Yingjie 1,2; Xin, Xin 2; Sun, Wenru 2
通讯作者	Xin, Xin(xxin@imr.ac.cn) ; Sun, Wenru(wrsun@imr.ac.cn)
	2024-08-15
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	995 页码:12
摘要	A study was conducted to investigate the effect of the combined addition of P and B on the gamma '' precipitate and creep properties of IN718 superalloy under long-term thermal exposure at 680 degrees C. Atomic probe tomography (APT) analysis and X-ray diffraction (XRD) results indicated that P could segregate in the gamma '' precipitates in a substitutional way and then improve the stability of the gamma '' precipitates when subjected to prolonged thermal exposure. No segregation of B was found in the gamma '' precipitates. The addition of P and B significantly improves the creep properties of the IN718 superalloy during long-term thermal exposure at 680 degrees C. By increasing the exposure time, the creep life of the high P and B alloy at 650 degrees C/725 MPa initially increased, peaking at 500 h, and then decreased as the exposure time increased. However, the low P and B alloy shows a consistent decrease in creep life with increasing thermal exposure time. During a relatively short thermal exposure, the microstructural analysis indicated that the substantial enhancement in creep life of the high P and B alloy primarily stems from cross twins and Lomer-Cottrell (LC) locks. As the thermal exposure time increases, the more stable gamma '' precipitates in the high P and B alloy, which directly improves the creep properties. The dominant deformation mechanism in the two alloys shifts from predominantly twin to a combination of twin, stacking fault (SF) and antiphase boundary-like (APB-like) shear gamma '' precipitate with prolonged thermal exposure.
关键词	IN718 superalloy Phosphorus and boron Long-term thermal exposure gamma '' precipitates Creep property
DOI	10.1016/j.jallcom.2024.174743
收录类别	SCI
语种	英语
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001240696500001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/186867
专题	中国科学院金属研究所
通讯作者	Xin, Xin; Sun, Wenru
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.South China Univ Technol, Guangzhou Int Campus, Guangzhou 511442, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhiyuan,Xue, Chaochao,Liu, Yingjie,et al. Effects of phosphorus and boron on the γ " precipitate evolution and creep properties of IN718 superalloy during long-term thermal exposure at 680 °C[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2024,995:12.
APA	Wang, Zhiyuan,Xue, Chaochao,Liu, Yingjie,Xin, Xin,&Sun, Wenru.(2024).Effects of phosphorus and boron on the γ " precipitate evolution and creep properties of IN718 superalloy during long-term thermal exposure at 680 °C.JOURNAL OF ALLOYS AND COMPOUNDS,995,12.
MLA	Wang, Zhiyuan,et al."Effects of phosphorus and boron on the γ " precipitate evolution and creep properties of IN718 superalloy during long-term thermal exposure at 680 °C".JOURNAL OF ALLOYS AND COMPOUNDS 995(2024):12.