Mg-based alloy cold worked member

Abstract

The present invention has as its object to provide an Mg-based alloy cold worked member which can remarkably lower the load weight required for cold plastic working and enables practical usage of the same. The present invention is an Mg-based alloy cold worked member obtained by cold working an Mg-based alloy to form it into a predetermined shape, characterized by having a microstructure which includes crystal grains divided and made finer by cold working.

1 . An Mg-based alloy cold worked member obtained by cold working an Mg-based alloy to form it into a predetermined shape, characterized by having a microstructure which includes crystal grains divided and made finer by cold working. 
     
     
         2 . An Mg-based alloy worked member as set forth in  claim 1 , characterized in that the Mg-based alloy forming the member has one or more types of lanthanoid type rare earth elements added to it. 
     
     
         3 . An Mg-based alloy worked member as set forth in  claim 1 , characterized by having an average value of its crystal grain size of 30 μm or less. 
     
     
         4 . An Mg-based alloy worked member as set forth in  claim 1 , characterized by being given an equivalent strain by cold working at room temperature or other temperature of 150° C. or less of, by absolute value, 0.17 (by nominal compressive strain, 0.15) or more.