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| 1 | Fabrication and characterization of laminated Ti-(TiB + La_2O_3)/Ti composite显示文摘The incorporation of ceramic particulate reinforcements into titanium alloys can improve the specific strength and specific stiffness,while inevitably reduce the plasticity and ductility.In this study,in situ synthesized multilayer Ti-(TiB +La_2O_3)/Ti composite was designed by learning from the microstructure of nature biological materials with excellent mechanical properties.The Ti-(TiB + La_2O_3)/Ti composite with unique characteristic of laminated structure was prepared by combined powder metallurgy and hot rolling.The method has the synthesize advantages with in-situ reaction of Ti and LaB_6 at high temperature and controllability of reinforcements size and constituent phases in composites.The result shows that the pores in the as sintered laminated structure composite completely disappeared after hot rolling at 1050℃.The agglomerated reinforcement particles were well dispersed and distributed uniformly along the rolling direction.The thickness of pure Ti layer and(TiB+La_2O_3)/Ti composite layer decreased from 1 mm to about 200 μm.Meanwhile,the grains size was refined obviously after rolling deformation.The room temperature tensile test indicates that the elongation of the laminated Ti-(TiB + La_2O_3)/Ti composite improved from 13%to 17%in comparison with the uniform(TiB + La_2O_3)/Ti composite,while the tensile strength had little change.It provides theoretical and experimental basis for fabricating the novel high performance laminated Ti-(TiB + La_2O_3)/Ti composites. | Yuanfei Han Hongqiang Duan Weijie Lu Liqiang Wang Di Zhang | 2015 | Progress in Natural Science:Materials International2015，25，5： | 8 |
| 2 | Combustion synthesis of bulk nanocrystalline iron alloys显示文摘The controlled synthesis of large-scale nanocrystalline metals and alloys with predefined architecture is in general a big challenge, and making full use of these materials in applications still requires greatly effort. The combustion synthesis technique has been successfully extended to prepare large-scale nanocrystalline metals and alloys, especially iron alloy, such as Fe C, Fe Ni, Fe Cu, Fe Si, Fe B, Fe Al, Fe Si Al, Fe Si B, and the microstructure can be designed. In this issue, recent progress on the synthesis of nanocrystalline metals and alloys prepared by combustion synthesis technique are reviewed. Then, the mechanical and tribological properties of these materials with microstructure control are discussed. | Licai Fu Jun Yang Weimin Liu | 2016 | Progress in Natural Science:Materials International2016，26，1： | 0 |
| 3 | 高能球磨-放电等离子烧结制备双尺度细晶钛(英文)显示文摘采用高能球磨和放电等离子烧结技术制备出包含粗晶区和细晶区的双尺度细晶钛,并研究不同球磨时间的钛粉烧结试样的显微组织和力学性能。实验结果表明,随着球磨时间的增加,钛粉烧结试样的显微组织先由粗晶转变为双尺度晶粒,随后又转变为均匀的细晶组织。与单一尺度的粗晶钛和细晶钛相比,双尺度细晶钛具有更好的强度和塑性的组合。在球磨10h钛粉烧结后的试样中,细晶区(平均晶粒尺寸为1μm)和粗晶区(晶粒尺寸大于5μm)的体积分数分别为65.3%和34.7%,其压缩强度达到1028 MPa,同时断裂时的塑形应变达到22%。 | 龙雁 郭文晶 李颖 | 2016 | Transactions of Nonferrous Metals Society of China2016，26，4： | 0 |
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