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.

本研究旨在弄清氧、氮、碳和氢等间隙元素在贝塔钛合金中的作用。在熔炼过程中，氧、氮和碳的含量由原料和气氛决定，而氢在冷加工过程中会被吸收。这可能是因为β相具有很大的氢溶解度。氢极大地抑制了亚稳β相向α相和β相的分解。通常情况下，BATA钛合金对氢脆不是很敏感，例如，在典型的商品化贝塔钛合金Ti-15V-3CR-3SN-3Al中，氢含量在100ppm到1000ppm范围内不会发生氢脆。在断裂点，合金中测得的氢量比其他合金中的要多。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：