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首页> 外文期刊>Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear >The solid particle erosion behavior of Al{sub}18B{sub}4O{sub}33 whisker-reinforced AC4C al alloy matrix composites
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The solid particle erosion behavior of Al{sub}18B{sub}4O{sub}33 whisker-reinforced AC4C al alloy matrix composites

机译：Al {sub} 18B {sub} 4O {sub} 33晶须增强AC4C铝合金基复合材料的固体颗粒腐蚀行为

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摘要

Steady-state solid particle erosion of squeeze-cast AC4C Al alloy and 19.5vol.% A1{sub}18B{sub}4O{sub}33 whisker/AC4C Al composites was investigated at room temperature. Experiments were performed with angular silica sand haying four velocities(55 ms{sup}-1 , 140 ms{sup}-1, 198 ms{sup}-1 and 243 ms{sup}-1) and at impact angle in the range 15°to 90°. The eroded surface and subsurface were observed using scanning electron and optical microscopy. The results indicated that erosioncharacteristics of the composites was affected by the particle velocity and impact angle. Steady-state rate was found to increase with the addition of whisker to the matrix alloy at high particle velocities or upon increasing impact angle. High erosionrate in the whisker reinforced composites can be attributed to reduced ductility. In addition to plastic deformation, flaking, gouging and microcutting, for the composites, fragmentation and dislodgement of Al{sub}18B{sub}4O{sub}33 whisker occurred withimpact of particles. At low particle velocity and shallow impact angle, the whisker at the surface can act as protective reinforcement to resist the microcutting and microploughing action. The erosion resistance for the Al{sub}18B{sub}4O{sub}33/AC4C Alcomposites was improved as a result of whisker addition.
机译：在室温下研究了压铸AC4C铝合金和19.5vol。％A1 {sub} 18B {sub} 4O {sub} 33晶须/ AC4C Al复合材料的稳态固态颗粒侵蚀。使用角质石英砂进行了四个速度（55毫秒{sup} -1、140毫秒{sup} -1、198毫秒{sup} -1和243毫秒{sup} -1）的试验，并且冲击角在15°至90°。使用扫描电子和光学显微镜观察腐蚀的表面和亚表面。结果表明，复合材料的冲蚀特性受颗粒速度和冲击角的影响。发现在高颗粒速度或冲击角增加时，向基体合金中添加晶须时，稳态速率会增加。晶须增强复合材料中的高腐蚀速率可归因​​于延展性降低。除了塑性变形，剥落，气刨和微切割外，复合材料还产生Al {sub} 18B {sub} 4O {sub} 33晶须的破碎和脱落，并受到颗粒的影响。在较低的粒子速度和较小的冲击角下，表面的晶须可充当保护性增强材料，以抵抗微切割和微耕作作用。添加晶须后，Al {sub} 18B {sub} 4O {sub} 33 / AC4C Al复合材料的耐蚀性得到改善。

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