Metallic material as a solid solution having a body-centered cubic (bcc) structure, an orientation of crystal axis <001> of which is controlled, and method of manufacturing the same

Abstract

An orientation of crystal axis <001> of the metallic material as a solid solution having a structure of body-centered cubic (BCC) is arranged along a work surface of the metallic material by hot rolling process in a temperature range of structuring the metallic material to be BCC single phase solid solution. For example, Fe-Si alloy as the metallic material is heated in the temperature range for BCC single phase solid solution, and processed so as to arrange the orientation of crystal axis <001> along the work surface by pressing the BCC single phase solid solution in a strain rate to maintain work condition for controlling motion of dislocation by atmosphere of solute atom generated in BCC single solid solution and migrating grain boundary by strain energy stored in a crystal grain as driving force.

1 . A method of manufacturing a metallic material as a solid solution having body-centered cubic (BCC) structure, comprising steps of:
 heating the metallic material in a temperature range to be single phase solid solution; and   distributing crystal axes <001> of the metallic material along a work surface of the metallic material by hot compression process in the temperature range.   
     
     
         2 . A method of manufacturing Fe-Si alloy as a metallic material, comprising steps of:
 heating the Fe-Si alloy in a temperature range to be single phase solid solution having body-centered cubic (BCC) structure; and   applying compression process on the solid solution having body-centered cubic (BCC) structure with a strain rate able to maintain process condition in which solute atmosphere generated in the single phase solid solution having body-centered cubic (BCC) structure can control motion of dislocation and grain boundary can move by strain energy stored in a crystal grain as driving force so as to distribute crystal plane {100} in parallel to a work surface of manufacturing process.   
     
     
         3 . The method of manufacturing a metallic material according to  claim 1 , wherein Fe-Si alloy is used as the solid solution having the body-centered cubic (BCC) structure; and compression process with strain rate from 1×10 −5 /s to 1×10 −1 /s is applied to the Fe-Si alloy heated in the temperature range to become single phase solid solution. 
     
     
         4 . The method of manufacturing a metallic material according to  claim 3 , wherein the temperature range is between 800-1300° C. 
     
     
         5 . The method of manufacturing a metallic material according to  claim 4 , wherein a total amount of strain of at least −0.5 is generated at the single phase solid solution having the body-centered cubic (BCC) structure by the compression process. 
     
     
         6 . A metallic material as a solid solution having the body-centered cubic (BCC) structure, wherein crystal axes <001> are distributed along a work surface of manufacturing process by hot compression process. 
     
     
         7 . The metallic material according to  claim 6 , wherein the solid solution having the body-centered cubic (BCC) structure has 14 times or more orientation density on a line of Φ=0° at φ 2 =0° section of crystal Orientation Distribution Function (ODF) indicating a distribution of the crystal axes <001> along the work surface of manufacturing process against an average value 1 of the orientation density. 
     
     
         8 . The metallic material according to  claim 6 , wherein Fe-Si alloy is used as the solid solution having the body-centered cubic (BCC) structure. 
     
     
         9 . The method of manufacturing a metallic material according to  claim 2 , wherein Fe-Si alloy is used as the solid solution having the body-centered cubic (BCC) structure; and compression process with strain rate from 1×10 −5 /s to 1×10 −1 /s is applied to the Fe-Si alloy heated in the temperature range to become single phase solid solution. 
     
     
         10 . The method of manufacturing a metallic material according to  claim 9 , wherein the temperature range is between 800-1300° C. 
     
     
         11 . The method of manufacturing a metallic material according to  claim 10 , wherein a total amount of strain of at least −0.5 is generated at the single phase solid solution having the body-centered cubic (BCC) structure by the compression process. 
     
     
         12 . The metallic material according to  claim 7 , wherein Fe-Si alloy is used as the solid solution having the body-centered cubic (BCC) structure.