Oxidation and hardness profile of V–Ti–Cr–Si–Al–Y alloys
Oxidation and hardness profile of V–Ti–Cr–Si–Al–Y alloys
复制标题
V-Ti-Cr-Si-Al-Y 合金的氧化和硬度曲线
DOI：
10.1016/s0022-3115(00)00386-x
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发表时间：
2000
影响因子：
3.1
通讯作者：
K. Abe
中科院分区：
文献类型：
--
作者：
M. Fujiwara;M. Satou;A. Hasegawa;K. Abe
选择了几种成分为V-4Ti-4Cr-(0-0.5)Si-(0-0.5)Al-(0-0.5)Y的合金在空气中氧化。此外，为了研究氦对V-4Ti-4Cr-0.5Si-0.5Al-0.5Y合金氧化行为的影响，对一种V-4Ti-4Cr-0.5Si-0.5Al-0.5Y合金进行了氦预注入。对拉伸试件和圆盘弯曲试件在300℃、500℃、600℃和700℃下进行了1h的空气中快速氧化试验，氧化后将拉伸试件安装在横截面上，并进行了显微压痕硬度测试。通过压痕试验获得的硬度增加的深度与用扫描电子显微镜(SEM)显微照片测量的解理断裂区的厚度相似。截面深度方向的硬度分布符合氧在钒中的扩散模型。对氦气注入和空气暴露的椎间盘标本进行了三点弯曲试验。700appm氦试件的弯曲应力大于70appm氦试件的弯曲应力。
Several alloys of composition V–4Ti–4Cr–(0–0.5)Si–(0–0.5)Al–(0–0.5)Y were selected for oxidation in air. In addition a V–4Ti–4Cr–0.5Si–0.5Al–0.5Y alloy was pre-implanted with helium to study the effect of helium on oxidation behavior. Rapid oxidation experiments in air were conducted on tensile specimens and disc bend specimens at 300°C, 500°C, 600°C and 700°C for 1 h. After oxidation, tensile specimens were mounted in cross-section, and micro-indentation hardness tests were conducted. The depths of increased hardness obtained by indentation tests and the thickness of cleavage fracture zones measured by using scanning electron microscopy (SEM) micrographs were similar. The hardness profile of the cross-section in the depth direction corresponded to a model of oxygen diffusion in vanadium. Three-point bend tests were conducted on helium-implanted and air- exposed disc specimens. The bending stress of the specimen with 700 appm helium was larger than that with 70 appm helium.