1. Key Laboratory of Advanced Forging & Stamping Technology and Science Yanshan University, Ministry of Education of China, Qinhuangdao 066004, Hebei, China 2. Yanshan University Library, Yanshan University,Qinhuangdao 066004, Hebei, China 3. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, Hebei, China
Prediction of Critical Conditions for Dynamic Recrystallization in 316LN Austenitic Steel
1. Key Laboratory of Advanced Forging & Stamping Technology and Science Yanshan University, Ministry of Education of China, Qinhuangdao 066004, Hebei, China 2. Yanshan University Library, Yanshan University,Qinhuangdao 066004, Hebei, China 3. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, Hebei, China
ժҪ Hot compression experiments conducted on a Gleeble-3500 thermo-mechanical simulator and metallographic observation tests were employed to study the critical conditions of dynamic recrystallization (DRX) of 316LN austenitic stainless steel. The true stress-true strain curves of 316LN were obtained at deformation temperatures ranging from 900 �� to 1200 �� and strain rates ranging from 0.001 s-1 to 10 s-1. Based on the above tests, the critical conditions of DRX were determined and compared with those obtained from work-hardening theory and the Cingara-McQueen flow stress model. Furthermore, the microstructure was observed to validate the calculated results. The ratio of critical strain to peak strain (��c/��p) for 316LN was determined, and the quantitative relationship between the critical strain and the deformation parameters of 316LN was elucidated. The results demonstrated that the onset of DRX corresponds to the constant normalized strain hardening rate (��), namely, the critical strain hardening rate ��c for 316LN is equal to 0.65.
Abstract��Hot compression experiments conducted on a Gleeble-3500 thermo-mechanical simulator and metallographic observation tests were employed to study the critical conditions of dynamic recrystallization (DRX) of 316LN austenitic stainless steel. The true stress-true strain curves of 316LN were obtained at deformation temperatures ranging from 900 �� to 1200 �� and strain rates ranging from 0.001 s-1 to 10 s-1. Based on the above tests, the critical conditions of DRX were determined and compared with those obtained from work-hardening theory and the Cingara-McQueen flow stress model. Furthermore, the microstructure was observed to validate the calculated results. The ratio of critical strain to peak strain (��c/��p) for 316LN was determined, and the quantitative relationship between the critical strain and the deformation parameters of 316LN was elucidated. The results demonstrated that the onset of DRX corresponds to the constant normalized strain hardening rate (��), namely, the critical strain hardening rate ��c for 316LN is equal to 0.65.
��������:National Natural Science Foundation of China;Scientific and Technological Research Foundation for Outstanding Young Talents of Hebei Provincial Universities;College Innovation Team Leader Training Program of Hebei Province
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E-mail: qrs@ysu.edu.cn
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Xin-gang LIU,Li-ge ZHANG,Rong-sheng QI,Lei CHEN,Miao JIN,Bao-feng GUO. Prediction of Critical Conditions for Dynamic Recrystallization in 316LN Austenitic Steel[J]. �й������ڿ���, 2016, 23(3): 238-243.
Xin-gang LIU,Li-ge ZHANG,Rong-sheng QI,Lei CHEN,Miao JIN,Bao-feng GUO. Prediction of Critical Conditions for Dynamic Recrystallization in 316LN Austenitic Steel. Chinese Journal of Iron and Steel, 2016, 23(3): 238-243.
2016, Vol. 23 
