Microstructure and high temperature oxidation resistance of in-situ synthesized TiN/Ti3Al intermetallic composite coatings on Ti6Al4V alloy by laser cladding process
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- 作者：Hongxi Liu ; piiiliuhx@sina.com" class="auth_mail" title="E-mail the corresponding author ; Xiaowei Zhang ; Yehua Jiang ; Rong Zhou
- 关键词：Laser cladding ; Intermetallic composite coating ; Titanium alloy ; High temperature oxidation resistance ; Microstructure
- 刊名：Journal of Alloys and Compounds
- 出版年：2016
- 出版时间：15 June 2016
- 年：2016
- 卷：670
- 期：Complete
- 页码：268-274
- 全文大小：2761 K
文摘
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In-situ TiN/Ti3Al composite coating was synthesized on Ti6Al4V alloy by laser cladding.
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The influence of Ti and AlN molar ratio on the microstructure of the coating was studied.
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The TiN/Ti3Al intermetallic coating is mainly composed of α-Ti, TiN and Ti3Al phases.
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The relative oxidation resistance of the coating at 600 °C and 800 °C is 6.83 and 1.94.
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The microhardness of the coating reaches 844HV0.2, 3.4 times higher than the bare substrate.