Formation mechanism and phase evolution of in situ synthesizing TiC-reinforced 316L stainless steel matrix composites by laser melting deposition
Formation mechanism and phase evolution of in situ synthesizing TiC-reinforced 316L stainless steel matrix composites by laser melting deposition
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DOI：
10.1016/j.matlet.2018.01.097
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发表时间：
2018-04
影响因子：
3
通讯作者：
Wu Chenliang;S. Zhang;C. Zhang;Jiubin Zhang;Y. Liu
中科院分区：
文献类型：
--
作者：
Wu Chenliang;S. Zhang;C. Zhang;Jiubin Zhang;Y. Liu
将316L奥氏体不锈钢、Cr 3C 2和Ti粉末按不同质量比混合，采用激光熔融沉积法制备了TiC增强铁基复合材料。通过Ti与Cr 3C 2反应原位合成了细小的TiC颗粒，并发现其均匀分散在基体中。添加Cr 3C 2和Ti粉后，γ-Fe基体中析出α-Fe相。通过热力学计算分析了TiC的形成和相演变机理。发现原位合成TiC的体积分数和尺寸对γ-Fe基体的晶粒织构有影响。
Different weight ratios of 316L austenitic stainless steel, Cr3C2and Ti powders were mixed to synthesize TiC-reinforced Fe-based composites by laser melting deposition. Fine TiC-particles were in situ synthesized through the reaction of Ti with Cr3C2and were found to be uniformly dispersed in the matrix. The α-Fe phase was precipitated out of the γ-Fe matrix with the addition of Cr3C2and Ti powders. The mechanism of TiC formation and phase evolution was analyzed based on thermodynamics calculations. The volume fraction and the size of the in situ synthesized TiC were found to affect grain texture of the γ-Fe matrix.