A thousandfold creep strengthening by Ca addition in die-cast AM50 magnesium alloy |
| |
| Authors: | Yoshihiro Terada Rie Sota Naoya Ishimatsu Tatsuo Sato Koichi Ohori |
| |
| Affiliation: | (1) the Department of Metallurgy and Ceramics Science, Tokyo Institute of Technology, Meguro-ku, 152-8552 Tokyo, Japan;(2) the Technical Development Center, Mitsubishi Aluminum Co., Ltd., 410-1127 Susono-shi, Shizuoka, Japan |
| |
| Abstract: | The effect of calcium addition on the microstructure and creep strength of the die-cast AM50 magnesium alloy was investigated. The α-Mg grains with the diameter of 4.9 μm are surrounded by the eutectic phases for the AM50-1.72 mass pct Ca alloy, while the β(Mg17Al12) particles are located mainly on the grain boundaries of the α grains for the AM50 alloy. The minimum creep rates of the AM50-1.72 mass pct Ca alloy are three orders of magnitude lower than those of the AM50 alloy at 423 K typically below 120 MPa. The thousandfold creep strengthening by the Ca addition is ascribed to the thermally stable eutectic phases appearing in the AM50-1.72 mass pct Ca alloy, which is expected to yield effective grain boundary strengthening or to resist the plastic flow of the α-Mg grains. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
