Enhanced strength-ductility synergy in fiber-like structural titanium matrix composites by controlling TiB content
Enhanced strength-ductility synergy in fiber-like structural titanium matrix composites by controlling TiB content
复制标题
通过控制 TiB 含量增强纤维状结构钛基复合材料的强度-延展性协同作用
DOI：
10.1016/j.jallcom.2022.165399
复制
发表时间：
2022-05
影响因子：
6.2
通讯作者：
Weijie Lu
中科院分区：
文献类型：
--
作者：
Huaduo Wu;Yuanfei Han;Jianwen Le;Nan Zong;Shaopeng Li;Yifei Luo;Guangfa Huang;Jianwei Mao;Weijie Lu
通过粉末冶金、热挤压、热轧等工艺，设计并制备了一种结构独特的新型钛基复合材料（tmc）。本文系统地研究了TiB含量对轧制态类纤维结构tmc的微观组织演变和力学响应的重要作用。设计的FLSCR-5%和FLSCR-10%类纤维结构材料的延展性分别达到24.4%和19%，表现出较好的强度和延性结合。这种强化是由等轴α晶粒的细化和TiB晶须的承载作用引起的。同时，连续Ti区显著地反映和钝化了裂纹扩展，从而提高了类纤维结构tmc的静态韧性，但增加FLSCR中TiB含量会降低其塑性，这是由于钛基体体积分数的降低和裂纹起裂率的增加。此外，由于纤维状复合材料区域的存在，异质变形引起的背应力显著增强了FLSCR-10%的应变硬化率（从~0.05应变到~0.135应变），有利于塑性。•新型纤维状结构在tmc中获得了高强度和高延展性的高匹配。•连续Ti区显著反射和钝化裂纹扩展。异质变形引起的背应力提高了FLSCR-10%复合材料的加工硬化率和塑性。
A new titanium matrix composites (TMCs) with distinctive architecture consisting of isolated fiber-like structural composites region (FLSCR) within continuously Ti region were designed and fabricated by powder metallurgy, hot extrusion, and subsequent hot rolling. This work systematically investigated the important role of TiB contents on microstructural evolution and mechanical response of the as-rolled fiber-like structural TMCs. The designed FLSCR-5% and FLSCR-10% with fiber-like structure obtain high ductility of 24.4% and 19%, respectively, which shows a better combination of strength and ductility. The strengthening is attributed to the refinement of the equiaxed α grains and the load-bearing effect of TiB whiskers. Meanwhile, continuously Ti region significantly reflects and blunts the crack propagation which is supposed to improve the static toughness of the fiber-like structural TMCs, but the ductility would be decreased by increasing TiB content in the FLSCR, which is attributed to the decreasing volume fraction of titanium matrix and the increasing crack initiation rate. Additionally, due to the fiber-like composites region, the strain hardening rate of the FLSCR-10% (from ~0.05 to ~0.135 strain) is significantly strengthened by the hetero-deformation induced back stress, which is beneficial to the ductility. • Novel fiber-like structure obtained high matching of high strength and ductility in TMCs. • Continuously Ti region significantly reflected and blunted the crack propagation. • Hetero-deformation induced back stress which improved the work hardening rate and ductility of the FLSCR-10% composites.
登录
查看更多内容
DOI：
10.1016/j.msec.2009.02.024
发表时间：
2009-08
期刊：
Materials Science and Engineering: C
影响因子：
--
作者：
Liqiang Wang;W. Lu;J. Qin;Fan Zhang;Di Zhang
通讯作者：
Liqiang Wang;W. Lu;J. Qin;Fan Zhang;Di Zhang
影响因子：
5.1
作者：
Xin Wei;Loris De Vico;P. Larroche;K. Kallio;Stefan Bruder;Martin Bellander;U. Gedde;M. Hedenqvist
通讯作者：
Xin Wei;Loris De Vico;P. Larroche;K. Kallio;Stefan Bruder;Martin Bellander;U. Gedde;M. Hedenqvist
DOI：
10.1016/s0928-4931(00)00133-8
发表时间：
2000-06
期刊：
Materials Science and Engineering: C
影响因子：
--
作者：
Chang-An Wang;Yong Huang;Q. Zan;Hai Guo;Shengyou Cai
通讯作者：
Chang-An Wang;Yong Huang;Q. Zan;Hai Guo;Shengyou Cai
DOI：
10.1016/j.msea.2011.03.018
发表时间：
2011-06-15
影响因子：
6.4
作者：
Li, Jiuxiao;Wang, Liqiang;Zhang, Di
通讯作者：
Zhang, Di
DOI：
10.1016/s0921-5093(97)00643-6
发表时间：
1997-12
影响因子：
6.4
作者：
Takahisa Yamamoto;A. Otsuki;K. Ishihara;P. H. Shingu
通讯作者：
Takahisa Yamamoto;A. Otsuki;K. Ishihara;P. H. Shingu