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http://dx.doi.org/10.5228/KSPP.2006.15.2.132

A Study on the Strain-Rate Sensitivity According to the Temperature for Steel Sheets of an Auto-Body  

Lee, H.J. (한국과학기술원 기계공학과)
Song, J.H. (한국과학기술원 기계공학과)
Cho, S.S. (한국과학기술원 기계공학과)
Park, S.H. (POSCO 기술연구소)
Huh, H. (한국과학기술원 기계공학과)
Publication Information
Transactions of Materials Processing / v.15, no.2, 2006 , pp. 132-137 More about this Journal
Abstract
This paper is concerned with the thermo-mechanical behavior including temperature dependent strain-rate sensitivity of steel sheet for an auto-body. In order to identify the temperature dependent strain-rate sensitivity of SPRC35R and SPRC45E, uniaxial tension tests are performed with the variation of the strain-rates from 0.001 /sec to 200 /sec at environmental temperatures varied from $-40^{\circ}C\;to\;200^{\circ}C$. The thermo-mechanical response at the quasi-static state is obtained with the static tensile test and at the intermediate strain-rate is from the high speed tensile test. Experimental results show that the strain-rate sensitivity increases at low temperature. It represents that as the strain-rate increases, the variation of flow stress becomes sensitive on the temperature. The results indicate that the flow stress of SPRC35R is more dependent on the changes of strain-rate and temperature than those of SPRC45E.
Keywords
Strain-Rate Sensitivity; Dynamic Strain Aging; Temperature Sensitivity; Intermediate Strain-Rate;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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