| Title |
Effect of Rolling Conditions on Microstructure and Mechanical Properties of HCC AZ31 Alloy Plate |
| Authors |
김영민(Young Min Kim); 천은영(Eun Young Chun); 임창동(Chang Dong Yim); 유봉선(Bong Sun You); 이재현(Je Hyun Lee) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
magnesium alloys; hot-rolling; horizontal continuous casting; microstructure; texture |
| Abstract |
The changes in microstructure and mechanical properties of AZ31 alloy subjected hot-rolling process were investigated. The AZ31 plates fabricated by horizontal continuous casting process were prepared and have hot-rolled from 30 mm to 1 mm in thickness under different processing conditions. At the rolling temperature of 400℃, little surface and side crack was observed up to 20% reduction rate. As total reduction and reduction rate increase to more than 75% and 20% pass, respectively, Grains were more uniformly refined through overall thickness, and particularly lots of shear bands were appeared to be inclined at less than 20° along the rolling direction. Average grain size of less than 5 μm and tensile properties of YS ≥ 250 MPa, UTS ≥ 300 MPa and El. ≥ 13% were acquired for hot-rolled AZ31 sheets without post-heat treatment. Maximum intensity of (0002) pole figure was decreased with an increase in reduction rate, indicating the improvement of texture by means of high reduction rate. |