TiC/ZA43 composites were fabricated by XD TM and stirring casting techniques. The tribology properties of the unreinforced ZA43 alloy and the composites were studied by using a block on ring apparatus. Experimental re...TiC/ZA43 composites were fabricated by XD TM and stirring casting techniques. The tribology properties of the unreinforced ZA43 alloy and the composites were studied by using a block on ring apparatus. Experimental results show that the incorporation of TiC particles improves the microstructure of ZA43 matrix alloy. The coefficient of friction μ and the width of worn groove decrease with the increase of TiC volume fraction φ (TiC). The width of worn groove and μ of the composite during wear testing increase with increasing the applied load. Metallographic examinations reveal that unreinforced ZA43 alloy has deep ploughing grooves with obvious adhesion phenomenon, whereas TiC/ZA43 composites have smooth worn surface. Delamination formation is related to the fatigue cracks and the shear cracks on the surface. [展开更多
The present paper reveals the wear behaviour of Zinc - Aluminium alloy reinforced with SiC particulate metal matrix composite. The composite is prepared using liquid metallurgy technique. The unlubricated pin-on disc ...The present paper reveals the wear behaviour of Zinc - Aluminium alloy reinforced with SiC particulate metal matrix composite. The composite is prepared using liquid metallurgy technique. The unlubricated pin-on disc wear test is conducted to find the wear behaviour of the ZA43 alloy based composite. The sliding wear test is conducted for different load, speed and time. The result reveals that wear rates of composite is reduced as reinforcement increases. For the same working conditions wear rate increases with increasing load and with increasing speed. The tested samples are examined by taking micro structure photos and analyzed for the type of wear. Dominating wear types observed are delamination and abrasion.展开更多
采用 XD法与搅拌铸造法相结合的工艺制备了 Ti C/ZA43复合材料 (0 <Vf<5.5% )。研究了 Ti C颗粒增强相对铸造 Ti C/ZA43复合材料组织及力学性能的影响 ,并对这些现象进行了理论分析。结果表明 ,Ti C颗粒使 Ti C/ZA43复合材料的微...采用 XD法与搅拌铸造法相结合的工艺制备了 Ti C/ZA43复合材料 (0 <Vf<5.5% )。研究了 Ti C颗粒增强相对铸造 Ti C/ZA43复合材料组织及力学性能的影响 ,并对这些现象进行了理论分析。结果表明 ,Ti C颗粒使 Ti C/ZA43复合材料的微观组织显著改善 ,Ti C在凝固过程中起到异质形核中心的作用。随着 Ti C颗粒的增加 ,Ti C/ZA43复合材料的室温抗拉强度、屈服强度、硬度均有显著提高 ,塑性有一些降低。Ti C/ZA43复合材料的高温力学性能明显优于基体合金。这主要是由于 Ti C颗粒的加入改变了 Ti C颗粒和 ZA43合金基体的载荷分配以及 Ti C颗粒加入引起的位错强化与细晶强化作用。展开更多
文摘TiC/ZA43 composites were fabricated by XD TM and stirring casting techniques. The tribology properties of the unreinforced ZA43 alloy and the composites were studied by using a block on ring apparatus. Experimental results show that the incorporation of TiC particles improves the microstructure of ZA43 matrix alloy. The coefficient of friction μ and the width of worn groove decrease with the increase of TiC volume fraction φ (TiC). The width of worn groove and μ of the composite during wear testing increase with increasing the applied load. Metallographic examinations reveal that unreinforced ZA43 alloy has deep ploughing grooves with obvious adhesion phenomenon, whereas TiC/ZA43 composites have smooth worn surface. Delamination formation is related to the fatigue cracks and the shear cracks on the surface. [
文摘The present paper reveals the wear behaviour of Zinc - Aluminium alloy reinforced with SiC particulate metal matrix composite. The composite is prepared using liquid metallurgy technique. The unlubricated pin-on disc wear test is conducted to find the wear behaviour of the ZA43 alloy based composite. The sliding wear test is conducted for different load, speed and time. The result reveals that wear rates of composite is reduced as reinforcement increases. For the same working conditions wear rate increases with increasing load and with increasing speed. The tested samples are examined by taking micro structure photos and analyzed for the type of wear. Dominating wear types observed are delamination and abrasion.
文摘采用 XD法与搅拌铸造法相结合的工艺制备了 Ti C/ZA43复合材料 (0 <Vf<5.5% )。研究了 Ti C颗粒增强相对铸造 Ti C/ZA43复合材料组织及力学性能的影响 ,并对这些现象进行了理论分析。结果表明 ,Ti C颗粒使 Ti C/ZA43复合材料的微观组织显著改善 ,Ti C在凝固过程中起到异质形核中心的作用。随着 Ti C颗粒的增加 ,Ti C/ZA43复合材料的室温抗拉强度、屈服强度、硬度均有显著提高 ,塑性有一些降低。Ti C/ZA43复合材料的高温力学性能明显优于基体合金。这主要是由于 Ti C颗粒的加入改变了 Ti C颗粒和 ZA43合金基体的载荷分配以及 Ti C颗粒加入引起的位错强化与细晶强化作用。
