Micromechanical characterization of rapidly-solidified Nb-TiNi hydrogen permeation alloy membranes
Micromechanical characterization of rapidly-solidified Nb-TiNi hydrogen permeation alloy membranes
复制标题
快速凝固Nb-TiNi氢渗透合金膜的微观力学表征
DOI：
10.2320/jinstmet.72.1015
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发表时间：
2008
影响因子：
--
通讯作者：
K. Aoki
中科院分区：
文献类型：
--
作者：
Y. Shimada;M. Matsuda;Y. Kawakami;M. Otsu;K. Takashima;M. Nishida;K. Ishikawa;K. Aoki
对快淬Nb-TiNi薄带进行了显微力学性能测试，研究了热处理过程中薄带组织变化与力学性能的关系。采用聚焦离子束（FI B）加工技术制备了尺寸为10（B）×20（W）×50（L）μm3的微悬臂梁试样。断裂试验在室温下在空气中进行，使用的机械试验机开发的微型试样。由非晶相组成的熔纺薄带的断裂韧性值（KQ）为5.3MPam1/2。相比之下，在773 K下退火3.6 ks的熔纺带的KQ降低到2.8 MPam 1/2。随着退火温度高于973 K，断裂韧性再次增加。这是由于非晶相的纳米晶化和B2-TiNi和bcc-Nb（Ti）相的立方对立方取向关系的聚集体的形成。这些结果表明，对于氢渗透膜的应用，需要高温退火。
The micromechanical tests have been performed for melt-spun Nb-TiNi ribbons, and the relation between the mechanical properties and microstructural change with heat treatment has been investigated. Micro-cantilever specimens with dimensions of 10(B)×20(W)×50(L)μm3 were prepared by focused ion beam (FIB) machining. Fracture tests were carried out at room temperature in air using a mechanical testing machine developed for micro-sized specimens. The fracture toughness value (KQ) of as-melt spun ribbon which consists of an amorphous phase was 5.3 MPam1/2. In contrast, the KQ of the melt-spun ribbon annealed at 773 K for 3.6 ks decreases to 2.8 MPam1/2. With annealing above 973 K fracture toughness increases again. This is due to the nanocrystallization of the amorphous phase and the formation of aggregates which are composed of B2-TiNi and bcc-Nb(Ti) phase with the cube-on-cube orientation relationship. These results suggest that the high temperature annealing is required for the application to the hydrogen permeation membrane.
影响因子：
6.2
作者：
Hashi, K;Ishikawa, K;Aoki, K
通讯作者：
Aoki, K