Loading...

Evaluation of low strain rate constitutive equation of 7075 aluminium alloy at high temperature

Jenab, A ; Sharif University of Technology | 2011

660 Viewed
  1. Type of Document: Article
  2. DOI: 10.1179/026708310X12683158443206
  3. Publisher: 2011
  4. Abstract:
  5. The 7075 aluminium alloy is one of the most important engineering alloys utilised extensively in aircraft and transportation industries due to its high specific strength. In the present research, the flow behaviour of this alloy has been investigated using hot compression test at strain rates of 0.001, 0.01, 0.1 and 1 s-1 and temperatures of 350, 400 and 450°C. The results reveal that dynamic softening occurred in these temperatures and strain rates. The activation energy, strain rate sensitivity and two constitutive equations (hyperbolic sine law and the power law) are derived from the results. It is shown that the hyperbolic sine law has a better agreement with the experimental results
  6. Keywords:
  7. Constitutive equation ; Hot deformation ; 7075 aluminium alloy ; Dynamic softening ; Engineering alloys ; Flow behaviours ; High specific strength ; High temperature ; Hot compression tests ; Low strain rates ; Power law ; Strain rate sensitivity ; Transportation industry ; Activation energy ; Aluminum ; Aluminum alloys ; Compression testing ; Constitutive equations ; High temperature engineering ; Hyperbolic functions ; Strain rate
  8. Source: Materials Science and Technology ; Volume 27, Issue 6 , 2011 , Pages 1067-1072 ; 02670836 (ISSN)
  9. URL: http://www.tandfonline.com/doi/full/10.1179/026708310X12683158443206