ISSN:
1013-9826
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
This paper investigates the dynamic tensile characteristics of TRIP600, TRIP800, DP600and DP800 at the range of strain rate from 0.003 to 200/s. The tensile test acquires stress−strain curvesand the strain rate sensitivity of each material. Experimental results show two important aspects forTRIP-type and DP-type sheets quantitatively: the flow stress increases as the strain rate increases; theelongation is not a monotonic function of the strain rate and increases at the same level of the strainrate even when the strain rate increases.In order to investigate the pre-strain effect for two types of metals at the high strain rate, TRIP600and DP600 were elongated with the pre-strain of 5 and 10% at the strain rate of 0.003/s. Then,dynamic tensile tests were carried out at the strain rate of 0.003, 1, 10 and 100/s. The resultsdemonstrate that the material properties of TRIP600 and DP600 are noticeably influenced by thepre-strain when the strain rate was over 1/s. The ultimate tensile strength as well as the yield stressincreases due to the pre-strain effect
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.340-341.255.pdf
