Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1637230 | Transactions of Nonferrous Metals Society of China | 2012 | 5 Pages |
Abstract
The effect of grain size on the flow stress in an ECAPed Ti with a constant texture was investigated, assuming that 2, 4, 5 and 6 passes microstructures have a similar texture. The average size of recrystallized grains decreased to 0.5 μm, 0.4 μm, and 0.3 μm with respect to the ECAP pass number of 2, 4, and 6, respectively. The ultimate tensile strength (UTS) and yield strength (YS) increase with an increase in the number of pressing. The UTS and YS of the 6 passes ECAPed sample were found to be 740.2 MPa and 580.3 MPa, respectively. An equation for the flow stress of an ECAPed Ti with a constant texture as a function of the strain and grain size was derived for the ECAPed metal. The following equation was finally obtained: Ï(Ï)=103.9+1825Ï-9.6Ï1/2·dâ1/2+8.3dâ1/2.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Chang-Young HYUN, Ho-Kyung KIM,