Strengthening and weakening in the processing of ultrafine-grained metals

2016 Kovové materiály  
It is now well established that ultrafine-grained (UFG) metals, with average grain sizes below 1 µm, may be produced by applying severe plastic deformation to bulk metals using processing procedures such as equal-channel angular pressing (ECAP) and high-pressure torsion (HPT). Generally, these procedures lead to a significant strengthening in the material but there are some examples where processing by ECAP or HPT produces a significant weakening. This report examines examples of both
more » ... s of both strengthening and weakening in the processing of UFG metals. K e y w o r d s : equal-channel angular pressing, high-pressure torsion, severe plastic deformation, ultrafine grains
doi:10.4149/km_2015_4_213 fatcat:mtwfuguy4fetrktpaobtayhffa