Effect of Al addition on formation and mechanical properties of Mg-Cu-Gd bulk metallic glass

• Published in: Transactions of Nonferrous Metals Society of China Vol. 17; no. 5; pp. 907 - 912
• Main Author: 耿家源 孙玉峰 王利国 朱世杰 刘利召 关绍康
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2007; School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450002, China
• Subjects: glass forming ability; mechanical properties; mg-based bulk metallic glasses; Mg-Cu-Gd合金; plastic strain; 机械力学; plastic strain; glass forming ability; mechanical properties; mg-based bulk metallic glasses
• ISSN: 1003-6326
• DOI: 10.1016/S1003-6326(07)60198-8

The effect of partial substitution of Al for Cu on the glass forming ability（GFA） and mechanical properties of Mg65Cu25-xAlxGd10 （x=0, 1, 3 and 5, molar fraction, %） alloys were studied by X-ray diffi-actometry（XRD）, differential scanning calorimetry（DSC） and uniaxial compression test. The result reveals that GFA of the alloys changes slightly with increasing x from 0 to 3, and then abruptly decreases with x increasing up to 5. The plasticity can be greatly improved with appropriate substitution of Cu by A1 （3%, molar fraction） in Mg65Cu25Gd10 bulk metallic glass, and the resultant fracture strength, total strain to failure, and plastic strain are 898 MPa, 2.19% and 0.2%, respectively.