화학공학소재연구정보센터
Materials Science Forum, Vol.426-4, 2807-2812, 2003
Influence of ECAP modes on texture and microstructure evolution of aluminium and copper
Severe plastic deformation up to extremely high deformation degree by means of Equal-Channel Angular Pressing (ECAP) is commonly proposed as a method to obtain ultra-fine grained microstructure. The advantage of this method is obtaining of bulk samples of relatively great dimensions and free from porosity in opposition to the methods based on powder metallurgy, rapid cooling or crystallization from gaseous phases. In the preceding papers of the author, the results of pressing, according to the mode (route) B, up to equivalent deformation epsilon similar to 8 in Equal Channel Angular apparatus were exemplified on Al and Cu samples and evolution of the microstructure, crystallographic texture in relation to their mechanical properties and thermal stability and in case of copper in relation to the mechanical stored energy were considered. In the present paper, the modes A and C are additionally considered and the influence of parameters, defining the connection mode of both parts of angular channel, on texture and microstructure evolution during pressing of Al and Cu are presented.