Showing papers by "Sushanta Kumar Panigrahi published in 2009"
TL;DR: In this article, the effect of plastic deformation on mechanical and ageing characteristics of Al-Mg-Si alloy (Al 6063 alloy) subjected to cryogenic and room temperature rolling was investigated by employing hardness measurements, tensile tests, XRD analysis, EBSD and TEM characterizations.
90 citations
TL;DR: In this paper, the microstructure and mechanical properties of a precipitation hardenable Al-Mg-Si alloy subjected to cryorolling (CR), short annealing and ageing treatments are reported.
54 citations
TL;DR: In this paper, an effect of ageing on mechanical properties of ultrafine grained Al 6061 alloys has been investigated, and the pre-cryorolled solid solution treatment combined with post-CR ageing treatment was found to be the optimum processing condition to obtain the ultrafine-grained microstructure with improved tensile strength (362MPa) and good tensile ductility (10.7%).
Abstract: An effect of ageing on mechanical properties of ultrafine grained Al 6061 alloys has been investigated in the present work. The solution treated bulk Al 6061 alloy was subjected to cryorolling to produce ultrafine grain structures and subsequently ageing treatment to improve its both strength and ductility. The hardness and tensile properties of solution treated, cryorolled, cryorolled and aged Al alloys were measured and explained by using their corresponding microstructural morphologies. The pre-cryorolled solid solution treatment combined with post-CR ageing treatment (1300C-30h) has been found to be the optimum processing condition to obtain the ultrafine grained microstructure with improved tensile strength (362MPa) and good tensile ductility (10.7%) in the Al 6061 alloy. The combined effect of precipitation hardening and recovery are responsible for the simultaneous improvement of both strength and ductility observed in the present work.
10 citations