Hot and Cold of Pressing Effect on ECAP-Parallel Channel Composite Based on Al/ANF Material

摘要

A new Severe Plastic Deformation (SPD) technique namely Equal Channel Angular Pressing with Parallel Channels (ECAP-PC) was developed to improve the performance of traditional ECAP. Traditional ECAP produces a gross distortion at both ends during the process. Thus, it resulted in high cost process, because it can cause waste materials that have been estimated from 30% to 50%. To overcome the problem, an alternative procedure was developed in which the ECAP was conducted using two parallel channels, the materials used AA1070 and AA6061 powder with Alumina Nano-Fiber (ANF) as reinforcement. Mechanical properties and Scanning Electron Microscope (SEM) were observed in room temperature pressure and 400°C heating pressure. Both results were compared to determine the effect of temperature on each process. The result was that at 400°C temperature pressure, the hardness generated more uniform with hardness average reached 69.3 and 94.52 HV_(10) and at room temperature pressure, the hardness generated less uniform with an average 30.1 and 73.6 HV_(10). In hot pressure there was not any micro-crack, but in room temperature pressure there were some micro-crack.