| SiC颗粒增强铝合金基复合材料断裂与强化机理 |
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| 引用本文： | 郭成,程羽,尚春阳,苏文斌,许建群.SiC颗粒增强铝合金基复合材料断裂与强化机理[J].复合材料学报,2001,18(4):54-57. |
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| 作者姓名： | 郭成 程羽 尚春阳 苏文斌 许建群 |
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| 作者单位： | 西安交通大学 机械工程学院, 西安 710049 |
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| 基金项目： | 西安交通大学在职博士基金资助 ( BS990 7) |
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| 摘 要： | 对SiC颗粒增强铝合金基复合材料的室温拉伸断裂与强化机理进行了研究。结果表明:该类材料的断裂包括基体韧断、界面脱开和增强体颗粒断裂三种方式,均属于MNG模式;该类复合材料的强化效果取决于基体强度与界面强度的匹配关系,当基体的屈服强度达到某一临界值时,通过添加增强体颗粒来强化材料是非常困难的。
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| 关 键 词： | 复合材料 断裂 强化 |
| 文章编号： | 1000-3851(2001)04-0054-04 |
| 收稿时间： | 1999-12-23 |
| 修稿时间： | 1999年12月23 |
MECHANISMS ON FRACTURE AND STRENGTHENING OF ALUMINIUM ALLOY MATRIX COMPOSITES REINFORCED WITH SiC PARTICLES |
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| GUO Cheng,CHENG Yu,SHANG Chun-yang,SU Wen-bin,XU Jian-qun.MECHANISMS ON FRACTURE AND STRENGTHENING OF ALUMINIUM ALLOY MATRIX COMPOSITES REINFORCED WITH SiC PARTICLES[J].Acta Materiae Compositae Sinica,2001,18(4):54-57. |
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| Authors: | GUO Cheng CHENG Yu SHANG Chun-yang SU Wen-bin XU Jian-qun |
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| Affiliation: | School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049 |
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| Abstract: | The mechanisms of tensile fracture and strengthening of aluminium alloy matrix composites reinforced with SiC particles are examined. The results show that fracture evolution entails a process of microvoid nucleation, growth, coalescence (MNG) for the PRMMCs and there exhibit three models of initial fracture in the process: toughness fracture of the matrix, boundary separation and particle break. Experimental analyses show that strengthening effect of the composites depends on the matching relations between the matrix and the boundary strength and it is very difficult to strengthen the composites when yield stress of the matrix goes beyound a certain critical value. |
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| Keywords: | composites fracture strengthening |
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