Author/Authors :
Moosalu، .H نويسنده Department of materials Engineering, Sahand University of Technology, Tabriz, Iran , , Noori Teymorlu، .A نويسنده Department of materials Engineering, Sahand University of Technology, Tabriz, Iran , , Parvini Ahmadi، .N نويسنده Department of materials Engineering, Sahand University of Technology, Tabriz, Iran , , Yazdani، .S نويسنده Department of materials Engineering, Sahand University of Technology, Tabriz, Iran ,
Abstract :
This study was conducted in order to investigate the influence of plastic deformation on the transformation of
retained austenite in a TRIP steel with a high content of Al and a low content of Si. To the aim, appropriate
treatments were used to produce the starting material (TRIP steel). The microstructure of the obtained steel was
composed of bainite and phases including ferrite and retained austenite. Afterwards, 40 % plastic deformation was
applied to the starting material using a rolling machine. Microhardness test, microstructural investigations and
determination of volume fraction of retained austenite by x-ray diffraction method before and after 40% cold work
demonstrated that the volume fraction of retained austenite in the starting material was decreased as the plastic
deformation was increased. During the plastic deformation, large grains of retained austenite were transformed to
martensite while the small ones tended to be stable.
