Microstructure and tensile behavior of novel laminated Ti–TiBw/Ti composites by reaction hot pressing
Microstructure and tensile behavior of novel laminated Ti–TiBw/Ti composites by reaction hot pressing
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DOI：
10.1016/j.msea.2013.06.058
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发表时间：
2013-10
期刊：
影响因子：
6.4
通讯作者：
B. Liu;L. Huang;L. Geng;Wang Bingzhu;X. Cui;Chen Liu;G. Wang
中科院分区：
文献类型：
--
作者：
B. Liu;L. Huang;L. Geng;Wang Bingzhu;X. Cui;Chen Liu;G. Wang
采用反应热压法成功制备了由Ti层和TiB晶须增强Ti（TiBw/Ti）复合层组成的新型叠层Ti-TiBw/Ti复合材料。本文采用热压法在Ti粉和TiB 2粉体系中原位合成TiBw/Ti复合层。复合层能有效细化Ti层晶粒。原位生成的TiB晶须对TiBw/Ti复合层中Ti基体晶粒的生长有明显的抑制作用。值得指出的是，原位合成的TiBw可以强化Ti层和TiBw/Ti层之间的界面。拉伸试验结果表明，Ti-TiBw/Ti层状复合材料的强度和塑性分别由纯Ti的546 MPa和17.5%提高到617 MPa和20.5%，表明通过对Ti-TiBw/Ti层状复合材料进行结构调整，有效地发挥了复合材料的强韧化作用。
A novel laminated Ti–TiBw/Ti composites composed of Ti layers and TiB whisker reinforced Ti (TiBw/Ti) composite layers were successfully fabricated by reaction hot-pressing. Herein, the TiBw/Ti composite layers were in situ synthesized by reaction in the system of Ti and TiB2powders during the hot pressing process. The composite layer can effectively refine grains of Ti layer. Moreover, in-situ synthesized TiB whiskers obviously restrain the growth of Ti matrix grains of the TiBw/Ti composite layers. It is worth pointing out that the in situ synthesized TiBw can strengthen the interface between Ti layer and TiBw/Ti layer. The tensile testing results show that the ultimate strength and the ductility of laminated composites can be increased to 617 MPa and 20.5%, respectively, from 546 MPa and 17.5% of pure Ti, indicating that the strengthening effect and the toughening effect of the composites were effectively exploited by tailoring the novel laminated structure of Ti–TiBw/Ti composites.