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Hot Deformation Behavior and Flow Stress Prediction of Ultra Purified 17% Cr Ferritic Stainless Steel Stabilized with Nb and Ti
Alternative TitleHot Deformation Behavior and Flow Stress Prediction of Ultra Purified 17% Cr Ferritic Stainless Steel Stabilized with Nb and Ti
Gao Fei1; Yu Fuxiao1; Liu Haitao2; Liu Zhenyu2
2015
Source PublicationJOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
ISSN1006-706X
Volume22Issue:9Pages:827-836
AbstractThe hot deformation behavior of ultra purified 17% Cr ferritic stainless steel stabilized with Nb and Ti was investigated using axisymmetric hot compression tests on a thermomechanical simulator. The deformation was carried out at the temperatures ranging from 700 to 1 100 degrees C and strain rates from 1 to 10 s(-1). The microstructure was investigated using electron backscattering diffraction. The effects of temperature and strain rate on deformation behavior were represented by Zener-Hollomon parameter in an exponent type equation. The effect of strain was incorporated in the constitutive equation by establishing polynomial relationship between the material constants and strain. A sixth order polynomial was suitable to represent the effect of strain. The modified constitutive equation considering the effect of strain was developed and could predict the flow stress throughout the deformation conditions except at 800 degrees C in 1 s(-1) and at 700 degrees C in 5 and 10 s(-1). Losing the reliability of the modified constitutive equation was possibly ascribed to the increase in average Taylor factor at 800 degrees C in 1 s(-1) and the increase in temperature at 700 degrees C in 5 and 10 s(-1) during hot deformation. The optimum window for improving product quality of the ferritic stainless steels was identified as hot rolling at a low finisher entry temperature of 700 degrees C, which can be achieved in practical production.
Other AbstractThe hot deformation behavior of ultra purified 17% Cr ferritic stainless steel stabilized with Nb and Ti was investigated using axisymmetric hot compression tests on a thermomechanical simulator. The deformation was carried out at the temperatures ranging from 700 to 1 100 ℃ and strain rates from 1 to 10 s~(-1). The microstructure was investigated using electron backscattering diffraction. The effects of temperature and strain rate on deformation behavior were represented by Zener-Hollomon parameter in an exponent type equation. The effect of strain was incorporated in the constitutive equation by establishing polynomial relationship between the material constants and strain. A sixth order polynomial was suitable to represent the effect of strain. The modified constitutive equation considering the effect of strain was developed and could predict the flow stress throughout the deformation conditions except at 800 ℃ in 1 s~(-1) and at 700 ℃ in 5 and 10 s~(-1). Losing the reliability of the modified constitutive equation was possibly ascribed to the increase in average Taylor factor at 800 ℃ in 1 s~(-1) and the increase in temperature at 700 ℃ in 5 and 10 s~(-1) during hot deformation. The optimum window for improving product quality of the ferritic stainless steels was identified as hot rolling at a low finisher entry temperature of 700 ℃, which can be achieved in practical production.
KeywordELEVATED-TEMPERATURE 42CRMO STEEL CONSTITUTIVE-EQUATIONS ROLLING TEMPERATURES TEXTURE DEVELOPMENT STICKING BEHAVIOR STRAIN-RATE FORMABILITY EVOLUTION ALLOYS 17%Cr ferritic stainless steel hot deformation flow stress constitutive equation strain compensation
Indexed ByCSCD
Language英语
Funding Project[National Science and Technology Pillar Program] ; [National Natural Science Foundation of China]
CSCD IDCSCD:5517483
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/148911
Collection中国科学院金属研究所
Affiliation1.中国科学院金属研究所
2.东北大学
Recommended Citation
GB/T 7714
Gao Fei,Yu Fuxiao,Liu Haitao,et al. Hot Deformation Behavior and Flow Stress Prediction of Ultra Purified 17% Cr Ferritic Stainless Steel Stabilized with Nb and Ti[J]. JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,2015,22(9):827-836.
APA Gao Fei,Yu Fuxiao,Liu Haitao,&Liu Zhenyu.(2015).Hot Deformation Behavior and Flow Stress Prediction of Ultra Purified 17% Cr Ferritic Stainless Steel Stabilized with Nb and Ti.JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL,22(9),827-836.
MLA Gao Fei,et al."Hot Deformation Behavior and Flow Stress Prediction of Ultra Purified 17% Cr Ferritic Stainless Steel Stabilized with Nb and Ti".JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL 22.9(2015):827-836.
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