Microstructure and hydrogen permeation of cold rolled and annealed Nb40Ti30Ni60 alloy
Microstructure and hydrogen permeation of cold rolled and annealed Nb40Ti30Ni60 alloy
复制标题
DOI：
10.1016/j.intermet.2008.10.003
复制
发表时间：
2009-03-01
期刊：
影响因子：
4.4
通讯作者：
Aoki, Kiyoshi
中科院分区：
文献类型：
--
作者：
Ishikawa, Kazuhiro;Tokui, Sho;Aoki, Kiyoshi
通过测量冷轧样品的厚度变化，估算了铸态Nb-TiNi合金的极限轧制压下率r(U)。利用维氏硬度计、扫描电子显微镜和质量流量计研究了冷轧和后续退火对铸态Nb40Ti30Ni30合金(摩尔分数)的硬度、显微组织、氢渗透率(0)和氢通量J的影响。Nb40Ti30Ni30合金的(1)值随轧制变形量的增加而减小，当变形量为50%时，(1)值达到原始变形量的1/3，但经137K、605K退火热处理后，(1)值又恢复到原来的值。在673K下，氢通量J与膜厚度成反比，对于厚度为120微米的样品，氢通量J达到12CCH(2)/cm(2)/min。本工作证明了轧制和后续的退火热处理对制备氢渗透Nb-TiNi合金膜是有效的。(C)2008爱思唯尔有限公司。保留所有权利。
The ultimate rolling reduction rate (r(u)) of the as-cast Nb-TiNi alloys was evaluated by measuring the thickness changes in cold rolled samples. Furthermore, the effects of cold rolling and subsequent anneal on hardness, microstructure, hydrogen permeability (0) and hydrogen flux J of the as-cast Nb40Ti30Ni30 alloy (mol%) were examined by a Vickers hardness tester, a scanning electron microscope (SEM), and a mass flow meter, respectively. The value of (1) for the Nb40Ti30Ni30 alloy was reduced with increasing rolling reduction rate and attained to one third of the original one by 50% rolling reduction, but recovered to the original one by anneal at 1373 K for 605 ks. Hydrogen flux J varied inversely proportional to the membrane thickness at 673 K. J of 12 ccH(2)/cm(2)/min was attained for the sample with the thickness of 120 mu m. The present work has demonstrated that rolling and the subsequent anneal are effective and useful for the preparation of the hydrogen permeation Nb-TiNi alloy membrane. (C) 2008 Elsevier Ltd. All rights reserved.