Effect of Temperature on the Wear Behavior of Al-7Si-TiB2 In-Situ Composites
Effect of Temperature on the Wear Behavior of Al-7Si-TiB2 In-Situ Composites
复制标题
DOI：
10.1007/s11661-008-9696-x
复制
发表时间：
2009-01-01
影响因子：
2.8
通讯作者：
Murty, B. S.
中科院分区：
文献类型：
--
作者：
Kumar, S.;Sarma, V. Subramanya;Murty, B. S.
在本文中，报道了温度和载荷对原位 TiB2 颗粒增强的 Al-7Si 合金干滑动磨损行为的影响。使用高温销盘装置测量了 Al-7Si 合金和原位复合材料的摩擦系数和磨损率。磨损试验在100℃到300℃的温度范围内进行，施加的载荷为40到120N。随着温度的升高，Al-7Si合金的磨损率急剧增加，并且随着TiB2颗粒重量百分比的增加而降低。在 100 摄氏度、150 摄氏度和 200 摄氏度的温度下，分别在 80、60 和 40 N 下观察到 Al-7Si 合金从轻度磨损到严重磨损的转变。添加 5 wt% TiB2 增强的合金在 120 N 和 200 ℃下表现出转变，并且在 300 ℃ 时转变载荷进一步降低至 80 N。然而，在目前的实验载荷范围内，添加 10 wt% TiB2 只在 100 N 和 300 ℃下表现出转变。TiB2 颗粒的添加提高了 Al-7Si 合金即使在高温下的耐磨性能。
In this article, the effect of temperature and load on the dry sliding wear behavior of an Al-7Si alloy reinforced with in-situ TiB2 particles is reported. The coefficient of friction and wear rate of Al-7Si alloy and in-situ composites were measured using a high-temperature pin-on-disc apparatus. The wear tests were performed in the temperature range of 100 degrees C to 300 degrees C, at an applied load of 40 to 120 N. With increasing temperature, the wear rate of Al-7Si alloy increased drastically and it decreased with the increase in weight percent of TiB2 particles. The transition from mild to severe wear for Al-7Si alloy was observed at 80, 60, and 40 N at temperatures of 100 degrees C, 150 degrees C, and 200 degrees C, respectively. The alloy reinforced with 5 wt pct of TiB2 showed the transition at 120 N and 200 degrees C, and the transition load further decreased to 80 N at 300 degrees C. However, within the present experimental range of load, the addition of 10 wt pct of TiB2 showed the transition only at 100 N and 300 degrees C. The addition of TiB2 particles increases the wear resistance properties of Al-7Si alloy even at high temperature.