A novel combined severe plastic deformation method for producing thin-walled ultrafine grained cylindrical tubes

作者：Abdolvand H; Sohrabi H; Faraji G^*; Yusof F

来源：Materials Letters, 2015, 143: 167-171.

DOI：10.1016/j.matlet.2014.12.107

• Severe plastic deformation
• Thin-walled tube
• AZ31
• Microstructure
• Grain boundaries
• Nanocrystalline materials

A novel severe plastic deformation (SPD) process entitled combined parallel tubular channel angular pressing (PTCAP) and tube backward extrusion (TBE) is proposed for producing thin-walled ultrafine-grained (UFG) tubes. In this new combined SPD approach, the PTCAP and TBE processes are consequently applied to the tube material in which a severe plastic strain is applied to produce a UFG thin-walled tube. This technique was performed on an AZ31 magnesium tube, and a remarkable grain refinement was achieved. The results showed that this method could easily produce a high strength thin walled tube. The microhardness increased significantly to 70 HV after the process from an initial value of 38 HV.

• 出版日期2015-3-15