차체용 강판의 온도에 따른 변형률속도 민감도 연구A Study on the Strain-Rate Sensitivity According to the Temperature for Steel Sheet of an Auto-Body

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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℃ to 200℃. the thermo-mechanical response at the quasi-static state is obtained with the static tensile test and 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 og strain-rate and temperature than those of SPRC45E.
Publisher
한국소성가공학회
Issue Date
2006
Keywords

Strain rate sensitivity; Dynamic strain aging; Temperature sensitivity; Intermediate strain rate

Citation

한국소성가공학회지, Vol.15, No.2, pp.132-137

URI
http://hdl.handle.net/10203/15590
Link
http://www.kstp.or.kr/
Appears in Collection
ME-Journal Papers(저널논문)

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