Cryogenic forming of AA7075 by equal-channel angular pressing

Fritsch, S.; Scholze, M.; Wagner, M.F.-X.

doi:10.1002/mawe.201200001

Cryogenic forming of AA7075 by equal-channel angular pressing (bibtex)

by S. Fritsch, M. Scholze, M.F.-X. Wagner

Abstract:

As high strength aluminum alloys are generally hard to deform, the application of conventional severe plastic deformation methods, which in principle allow the generation of ultra fine grained microstructures and increasing strength, is limited. In this study, cryogenic ECAP deformation as an alternative approach to deform a 7075 alloy is explored. Here, a tool with an internal angle of 90° is used.We demonstrate that cryogenic ECAP (followed by suitable heat treatments) results in increases of the degree of deformation, strength and ductility. Moreover, we present first results on the effect of cryogenic ECAP on microstructural evolution and mechanical properties of the 7075 alloy that demonstrate the potential of cryogenic forming to produce improved properties of high-strength aluminum alloys.

Reference:

Fritsch, S., Scholze, M. and Wagner, M.F.-X.: Cryogenic forming of AA7075 by equal-channel angular pressing, Materialwissenschaft und Werkstofftechnik 43, 561-566, 2012.

Bibtex Entry:

@Article{Fritsch2012,
  author   = {Fritsch, S. and Scholze, M. and Wagner, M.F.-X.},
  journal  = {Materialwissenschaft und Werkstofftechnik},
  title    = {{Cryogenic forming of {AA7075} by equal-channel angular pressing}},
  year     = {2012},
  issn     = {09335137},
  number   = {7},
  pages    = {561--566},
  volume   = {43},
  abstract = {As high strength aluminum alloys are generally hard to deform, the application of conventional severe plastic deformation methods, which in principle allow the generation of ultra fine grained microstructures and increasing strength, is limited. In this study, cryogenic ECAP deformation as an alternative approach to deform a 7075 alloy is explored. Here, a tool with an internal angle of 90° is used.We demonstrate that cryogenic ECAP (followed by suitable heat treatments) results in increases of the degree of deformation, strength and ductility. Moreover, we present first results on the effect of cryogenic ECAP on microstructural evolution and mechanical properties of the 7075 alloy that demonstrate the potential of cryogenic forming to produce improved properties of high-strength aluminum alloys.},
  doi      = {10.1002/mawe.201200001},
  keywords = {cryogenic ECAP, high-strength aluminum alloy, mechanical properties, ultra-fine grained microstructure},
}