標題: Microstructure and Wear Property of As-cast Mg-2-wt.%-Sn Alloys after Different Heat Treatment Processes
作者: Chen, Jung-Hsuan
Wang, Yi-Fung
Chao, Chuen-Guang
Liu, Tzeng-Feng
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: Mg-Sn alloy;microstructure;wear property;solution heat treatment
公開日期: 1-Jan-2019
摘要: The developments of biodegradable materials for orthopaedic implants has been progressing rapidly for decades. Biodegradable implants can eliminate the need for a second surgery and avoid the possible risks of retained metallic implants, such as corrosion or strength weakening. Magnesium (Mg) alloy is one of the potential materials for biodegradable implants because of its good biocompatibility and biodegradability. In this study, the microstructures and mechanical properties, especially the wear behavior and friction characteristics of Mg-Sn alloys, were investigated. Mg-Sn alloys fabricated by the ingot casting method were applied to different heat treatments, and then subjected to the pin-on-disc wear test. Experimental results showed that the Mg-Sn alloy processed by solution heat treatment (SHT) at 520 degrees C and quenching had the best wear resistance and lowest coefficient of friction (COF). The decrease in the amount of hard precipitate Mg2Sn and the solid-solution strengthening induced by the excess Sn atoms in the Mg matrix were the main causes of the enhancement of the wear properties of the Mg-Sn alloy upon SHT, compared with as-cast Mg-Sn alloy and the Mg-Sn alloys made by other heat treatments.
URI: http://dx.doi.org/10.18494/SAM.2019.2108
http://hdl.handle.net/11536/148892
ISSN: 0914-4935
DOI: 10.18494/SAM.2019.2108
期刊: SENSORS AND MATERIALS
Volume: 31
起始頁: 469
結束頁: 477
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