Effects of Interstitial Elements on the Fracture of Beta

间隙元素对β断裂的影响

• 批准号: 05650667
• 负责人: NIWA Naotake
• 金额: $ 1.6万
• 依托单位: Kogakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650667/
• 关键词: beta titanium alloys; fracture; hydrogen embrittlement; hydride; interstitial elements; beta phase; solubility; alpha phase; β型チタン合金; 水素; ベータ型チタン合金; 時効; 酸素

This study aims to make clear the role of interstitial elements i.e.oxygen, nitrogen, carbon and hydrogen on beta titanium alloys. Content of oxygen, introgen and carbon of the alloys are determined by raw materials and atmosphere during melting, however, hydrogen is exceptional i.e.absorbed into the alloys during cold-working. This would be because beta phase has large hydrogen solubility. Hydrogen greatly suppresses the decomposition of metastable beta phase to alpha and beta phases. In general bata titanium alloys are not so sensitive to hydrogen embrittlement, for example, in the one of typical commercial beta titanium alloys Ti-15V-3Cr-3Sn-3Al, hydrogen embrittlement does not occur in the range of from 100ppm to 1000ppm hydrogen content. At the break point larger amount of hydrogen is measured in the alloy than in other alloys. It is probably because beta phase has large solubility of hydrogen.

这项研究旨在清楚地间元素的作用，即氧，氮，碳和氢在β钛合金中的作用。合金的氧气，静脉基和碳的含量取决于熔融过程中的原材料和气氛，但是，氢在冷施工过程中是特殊的，即在合金中吸收。这是因为β相具有较大的氢溶解度。氢极大地抑制了亚稳态β期与α和β相的分解。总的来说，BATA钛合金对氢的含糖并不那么敏感，例如，在典型的商业β钛合金之一TI-15V-3CR-3CR-3SN-3AL中，氢拥中不发生在100ppm到1000ppm氢含量的范围内。在断裂点，在合金中比其他合金测量更大的氢。这可能是因为β相具有较大的氢溶解度。

项目成果

K.アルフアソウ固溶度:

K.阿尔法溶解度：