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| Effect of Cooling Medium on Mechanical Properties of AS Annealed Cu50Zr42Al8 Bulk Metallic Glass |
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| DOI：DOI：10.3969/j.issn.1007-7545.2011.06.010 |
| KeyWord:metal material; bulk metallic glass; annealing; cooling medium; mechanical properties |
| Author | Institution |
| ZHAO Yan-chun |
兰州理工大学 甘肃省有色金属新材料省部共国家重点实验室，兰州 |
| KOU Sheng-zhong |
1.兰州理工大学 甘肃省有色金属新材料省部共国家重点实验室，兰州 ;2.北京工业大学 材料学院国家教育部功能材料重点实验室，北京 |
| WANG Ren-jun |
兰州理工大学 甘肃省有色金属新材料省部共国家重点实验室，兰州 |
| SUO Hong-li |
北京工业大学 材料学院国家教育部功能材料重点实验室，北京 |
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| Abstract: |
| The effect of liquid nitrogen quenching and furnace cooling on compression fracture behavior of Cu50Zr42Al8 bulk metallic glass after anealed at 790K+30min in supercooled liquid region is investigated. The ?5mm BMG composites exhibit compressive fracture strength and yielding strength of 1849MPa and 1670MPa with plastic strain of 1.9% and Young’s modulus of 104.4GPa. Compressive fracture strength and Young’s modulus of the liquid nitrogen quenched and air cooled samples are 912MPa, 678MPa and 38GPa, 56.5GPa, respectively. Compressive fracture strength and Young’s modulus of the liquid nitrogen quenched sample with a partial amphous structure are 912MPa and 38GPa, and the air cooled sample with a totally crystalline structure are 678MPa and 38GPa, respectively. The brittle crystalline phases are identified as tetragonal CuZr2, orthorhombic Cu10Zr7 and AlCu2Zr with DO3 structure. |
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