Friction-based riveting technique for AZ31 magnesium alloy  

作　　者：Tianhao Wang Scott Whalen Xiaolong Ma Joshua Silverstein Hrishikesh Das Madhusudhan R.Pallaka Angel Ortiz Timothy Roosendaal Piyush Upadhyay Keerti S Kappagantula 

机构地区：[1]Pacific Northwest National Laboratory,MSIN:K2-03,902 Battelle Blvd.,Richland,WA 99352,United States

出　　处：《Journal of Magnesium and Alloys》2022年第1期122-130,共9页镁合金学报（英文）

基　　金：the support of the U.S.Department of Energy Vehicle Technologies Office(DOE/VTO)Joining Core Program。

摘　　要：A new friction-based riveting technique, Rotating Hammer Riveting(RHR), is demonstrated to fully form AZ31 Mg rivet heads in a mere 0.23 s. Heat and pressure generated through severe plastic deformation during the process was sufficient to form the Mg rivet head without the need for a pre-heating operation. Due to preliminary twinning and followed by dynamic recrystallization, AZ31 Mg grains in the rivet head were refined during RHR, which enhance the formability of Mg rivets by triggering grain boundary sliding and reducing plastic anisotropy of Mg. In addition, RHR joints showed a metallurgical bond between the rivet head and top AZ31 Mg sheet, which eliminates a significant pathway for corrosion.

关 键 词：RIVET MAGNESIUM Dissimilar joining 

分 类 号：TG938[金属学及工艺—钳工工艺]