Effects of Aging Temperature on Microstructure and Properties of In-Situ Hybrid Ti Matrix Composites with TiB and TiC Reinforcements

Cheng Jingfan; Yang Songfeng; Chen Fei; Zhao Bingyi; Xu Can; Cai Qizhou

doi:10.15980/j.tzzz.2020.08.002

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Effects of Aging Temperature on Microstructure and Properties of In-Situ Hybrid Ti Matrix Composites with TiB and TiC Reinforcements
Vol. 40, Issue 8, Pages: 819-823(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.08.002

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[1]程婧璠,杨松峰,陈霏,赵炳怡,徐灿,蔡启舟.时效温度对原位TiB+TiC复相增强钛基复合材料组织和性能的影响[J].特种铸造及有色合金,2020,40(08):819-823.

Cheng Jingfan, Yang Songfeng, Chen Fei, et al. Effects of Aging Temperature on Microstructure and Properties of In-Situ Hybrid Ti Matrix Composites with TiB and TiC Reinforcements. [J]. Special Casting & Nonferrous Alloys 40(8):819-823(2020)
[1]程婧璠,杨松峰,陈霏,赵炳怡,徐灿,蔡启舟.时效温度对原位TiB+TiC复相增强钛基复合材料组织和性能的影响[J].特种铸造及有色合金,2020,40(08):819-823. DOI： 10.15980/j.tzzz.2020.08.002.

Cheng Jingfan, Yang Songfeng, Chen Fei, et al. Effects of Aging Temperature on Microstructure and Properties of In-Situ Hybrid Ti Matrix Composites with TiB and TiC Reinforcements. [J]. Special Casting & Nonferrous Alloys 40(8):819-823(2020) DOI： 10.15980/j.tzzz.2020.08.002.

摘要

研究了时效温度对SPS原位合成的TiB+TiC复相增强Ti-6Al-4V复合材料组织和性能的影响。结果表明

在673～873 K的温度范围时效处理时

随时效温度升高

固溶处理的马氏体逐渐分解

形成弥散点状α+β组织

当时效温度超过823 K后

β相粗化。在773 K时效时复合材料的力学性能最佳

其压缩强度、屈服强度和工程应变分别为1 970、1 632 MPa和15.2%。复合材料的硬度随时效温度的升高而降低。随着磨损载荷增加

复合材料的摩擦因数降低

磨损失重逐渐升高;低载荷时主要发生磨粒磨损

当载荷为50 N时其磨损机制为磨粒磨损和氧化磨损共同作用。

Abstract

Effects of ageing temperature on the microstructure and properties of in situ hybrid Ti-6 Al-4 V composites with TiB and TiC reinforcements were investigated. The results show that

with the increase of 673～873 K aging temperature

the martensite formed during solid solution treatment is decomposed gradually and transform to β phase with dispersive distribution and α phase. When the aging temperature is higher than 823 K

the β phase is coarsened. The mechanical properties of the composites aged at 773 K present the acceptable data

where the compressive strength

yield strength and engineering strain reach 1 970 MPa

1 632 MPa and 15.2%

respectively. The Vickers hardness of the composites is decreased with the increase of aging temperature. With the increase of wear loads

the friction coefficient of the composites is decreased and the wear loss is increased gradually. The wear mechanism under low load is characterized by abrasive wear

while the wear mechanism is characterized by co-action of abrasive wear and oxidation wear with the load of 50 N.