High Temperature High Cycle Fatigue Properties of MRI Mg Alloy

• Main Authors: Shu-chieh Chao, 趙書傑
• Other Authors: Kuo-Cheng Tai
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/27647944697075420826

碩士 === 逢甲大學 === 機械工程學所 === 95 === The fatigue property of Magnesium Alloy at high temperature is investigated. This study including Magnesium Alloy MRI 230D and Magnesium Alloy MR 153M together with 25℃, 100℃, 200℃, 300℃ and 400℃ are tested with fixed temperature and loading to find out the behavior of Magnesium Alloy at high temperature. Most high-cycle fatigue strength at every kinds of temperature is decreasing with increasing temperature because the yield strength is reducing with the enhancing temperature. The temperature from 25℃ to 200℃ is brittle fracture. High-cycle fatigue at 300℃ usually generates winding fracture because most educt are separated out and re-crystallized to soften to facture along grain boundary. High-cycle fatigue at 400℃ is difficult to test because the surface of Magnesium Alloy is oxidized with long time.