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Hot deformation characteristics of a nitride strengthened martensitic heat resistant steel
W. F. Zhang; X. L. Li; W. Sha; W. Yan; W. Wang; Y. Y. Shan; K. Yang
2014
Source PublicationMaterials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN0921-5093
Volume590Pages:199-208
AbstractConstitutive equations including an Arrhenius term have been applied to analyze the hot deformation behavior of a nitride-strengthened (NS) martensitic heat resistant steel in temperature range of 900-1200 degrees C and strain rate range of 10(-3)-10 s(-1). On the basis of analysis of the deformation data, the stress-strain curves up to the peak were divided into four regions, in sequence, representing four processes, namely hardening, dynamic recovery (DRV), dynamic strain induced transformation (DSIT), and dynamic recrystallization (DRX), according to the inflection points in partial derivative/theta and partial derivative(partial derivative theta/partial derivative sigma)/partial derivative sigma curves. Some of the inflection points have their own meanings. For examples, the minimum of partial derivative theta/partial derivative sigma locates the start of DRV and the maximum of it indicates the start of DRX. The results also showed that the critical strain of DRX was sensitive to ln(Z) below 40, while the critical stress of DRX was sensitive to it above 40. The final microstructures under different deformation conditions were analyzed in terms of softening processes including DRV, DRX, metadynamic crystallization (MDRX) and DSIT. (C) 2013 Elsevier B.V. All rights reserved.
description.department[zhang, wen-feng] univ sci & technol china, hefei 230026, peoples r china. [zhang, wen-feng ; yan, wei ; wang, wei ; shan, yi-yin ; yang, ke] chinese acad sci, inst met res, shenyang 110016, peoples r china. [zhang, wen-feng] chinese acad sci, grad sch, beijing 100049, peoples r china. [li, xiao-li] univ sci & technol liaoning, anshan 114000, peoples r china. [sha, wei] queens univ belfast, sch planning architecture & civil engn, belfast bt9 5ag, antrim, north ireland. ; yang, k (reprint author), chinese acad sci, inst met res, shenyang 110016, peoples r china. ; kyang@imr.ac.cn
KeywordSteel Mechanical Characterization Martensite Thermomechanical Processing Recrystallization Phase Transformation Induced Ferrite Transformation Dynamic Recrystallization Working Nb Initiation Austenite Kinetics
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72371
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
W. F. Zhang,X. L. Li,W. Sha,et al. Hot deformation characteristics of a nitride strengthened martensitic heat resistant steel[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2014,590:199-208.
APA W. F. Zhang.,X. L. Li.,W. Sha.,W. Yan.,W. Wang.,...&K. Yang.(2014).Hot deformation characteristics of a nitride strengthened martensitic heat resistant steel.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,590,199-208.
MLA W. F. Zhang,et al."Hot deformation characteristics of a nitride strengthened martensitic heat resistant steel".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 590(2014):199-208.
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