文献类型：会议论文

中文题名：Effect of laser parameters on the mechanical properties of in situ synthesized TiN/Ti3Al composite coatings on Ti6Al4V

作者：Zhengdao Liu[1];Jinsha Xu[1];Xiancheng Zhang[1];Fu-Zhen Xuan[1];Zhengdong Wang[1];

机构：[1]Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China;

会议论文集：2011 International Symposium on Structural Integrity [2011国际结构完整性学术研讨会--核工程结构完整性技术 ISSI 2011]论文集

会议日期：20111027

会议地点：合肥

主办单位：中国机械工程学会

语种：英文

中文关键词：Composite coating;Laser nitriding;Microhardness;Elastic modulus;Fracture toughness

摘要：A novel method was developed to synthesize the TiN reinforced Ti3Al intermetallic matrix composite (IMC) coatings on Ti6A14V substrate. This method can be divided into two steps, namely deposition of Al coating on Ti6A14V substrate by using plasma spraying and laser nitriding in nitrogen atmosphere. The effects of nitrogen flow rate and laser scanning speed used in laser nitriding on the mechanical properties of the TiN/Ti3Al composite coatings, such as microhardness, elastic modulus and fracture toughness, were investigated. Results showed that the mechanical properties of coatings were strongly dependent on laser parameters. With increasing nitrogen flow rate or decreasing scanning speed, the amount and density of TiN phase in the coating increased, leading to increased microhardness and elastic modulus, and decreased fracture toughness.