High-temperature Tensile Behavior in Coarse-grained and Fine-grained Nb-containing 25Cr-20Ni Austenitic Stainless Steel

doi:10.1007/s40195-020-01076-2

IMR OpenIR

	High-temperature Tensile Behavior in Coarse-grained and Fine-grained Nb-containing 25Cr-20Ni Austenitic Stainless Steel
	Hu, Guodong; Wang, Pei; Li, Dianzhong; Li, Yiyi
	2020-11-01
Source Publication	ACTA METALLURGICA SINICA-ENGLISH LETTERS
Volume	33 Issue:11 Pages:1455-1465
Abstract	In this study, tensile behavior of Nb-containing 25Cr-20Ni austenitic stainless steels composed of coarse or fine grains has been investigated at temperatures ranging from room temperature to 900 degrees C. Results show that the tensile strength of fine-grained specimens decreases faster than that of coarse-grained specimens, as the test temperature increases from 600 degrees C to 800 degrees C. The rapidly decreasing tensile strength is attributed to the enhanced dynamic recovery and recrystallization, because additional slip systems are activated, and cross-slipping is accelerated during deformation in fine-grained specimens. After tensile testing at 700-900 degrees C, sigma phases are formed concurrently with dynamic recrystallization in fine-grained specimens. The precipitation of sigma phases is induced by simultaneous recrystallization as the diffusion of alloying elements is accelerated during the recrystallization process. Additionally, the minimum ductility is observed in coarse-grained specimens at 800 degrees C, which is caused by the formation ofM(23)C(6)precipitates at the grain boundaries.
DOI	10.1007/s40195-020-01076-2
WOS ID	WOS:000542515900003
Citation statistics
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/82749
Collection	中国科学院金属研究所
Recommended Citation GB/T 7714	Hu, Guodong,Wang, Pei,Li, Dianzhong,et al. High-temperature Tensile Behavior in Coarse-grained and Fine-grained Nb-containing 25Cr-20Ni Austenitic Stainless Steel[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2020,33(11):1455-1465.
APA	Hu, Guodong,Wang, Pei,Li, Dianzhong,&Li, Yiyi.(2020).High-temperature Tensile Behavior in Coarse-grained and Fine-grained Nb-containing 25Cr-20Ni Austenitic Stainless Steel.ACTA METALLURGICA SINICA-ENGLISH LETTERS,33(11),1455-1465.
MLA	Hu, Guodong,et al."High-temperature Tensile Behavior in Coarse-grained and Fine-grained Nb-containing 25Cr-20Ni Austenitic Stainless Steel".ACTA METALLURGICA SINICA-ENGLISH LETTERS 33.11(2020):1455-1465.

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