Effect of secondary phases on the strength and elongation of a novel Mo-TiC-ZrC-C alloy. (November 2020)

• Record Type: Journal Article
• Authors: Hu, Bo-liang; Wang, Kuai-she; Hu, Ping; Su, Yu-tong; Li, Shi-Lei; Xing, Hai-rui; Han, Jia-yu; Ge, Song-wei; Hua, Xing-jiang; Fu, Jing-bo; Chang, Tian
• Is Part Of: International journal of refractory metals & hard materials. Volume 92(2020)
• Publication Date: 2020-11
• Subjects: Mo-TiC-ZrC-C alloy -- Secondary phases -- Interface -- Strength -- Elongation; Heat resistant alloys -- Periodicals; Refractory materials -- Periodicals; Metallography -- Periodicals; Alliages réfractaires -- Périodiques; Matériaux réfractaires -- Périodiques; Métallographie -- Périodiques; Heat resistant alloys; Metallography; Refractory materials; Periodicals; Electronic journals; 669.73
• DOI: 10.1016/j.ijrmhm.2020.105336
• Languages: English
• ISSNs: 0263-4368

Abstract

Abstract: Previous experimental studies in the Mo-TiC-ZrC-C (TZM) alloy have shown the existence of secondary phases around the composition TiC, ZrC, TiO2, ZrO2 and ZrTiO4 . No research about the interface of secondary phases and Mo matrix was indicated. We characterized the different secondary phases influence on the structure and mechanical properties by the mismatch and electron density. And discovered that ZrTiO4 has largest lattice misfit and electron density, contributing to better strengthening and toughening of TZM alloy. The ZrTiO4 interface bonding strength is superior to the other secondary phases. This new understanding opens opportunities for designing high strengthening-toughening Mo alloy. Graphical abstract: Unlabelled Image Highlights: The effect of addition of TiC and ZrC on the strength and elongation of Mo-TiC-ZrC-C is studied The composition 0.08%TiC-0.11%ZriC-0.06%C showed high strength of tensile strength 1292.65 Mpa and elongation 6.9%. ZrTiO4 has largest lattice misfit and electron density, contributing to better strengthening and toughening of TZM alloy.