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Titanium alloy having high strength, high young's modulus, excellent fatigue properties, and excellent impact toughness
Titanium alloy having high strength, high young's modulus, excellent fatigue properties, and excellent impact toughness
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机译：具有高强度，高杨氏模量，优异的疲劳性能和优异的冲击韧性的钛合金
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摘要
Provided is an α+β titanium alloy hot-rolled sheet consisting of, in mass %, Al: 4.7 to 5.5%, Fe: 0.5 to 1.4%, N: less than or equal to 0.03%, Si: 0.15 to 0.40%, a ratio of Si/O: 0.80 to 2.80, [O]eq in Expression (1): more than or equal to 0.13% and less than 0.25%, and the balance: Ti and impurities. In a case where an ND direction represents a normal direction of the hot-rolled sheet, a TD direction represents a sheet-width direction of the hot-rolled sheet, a c-axis orientation represents a normal direction of a (0001) plane in an α phase, XND represents a strongest intensity among X-ray (0002) reflection relative intensities of crystal grains in which the c-axis orientation is in a range of 30° from the ND direction, and XTD represents a strongest intensity among intensities in which the c-axis orientation is in a range of ±10 degrees in the TD direction, XTD/XND is more than or equal to 4.0, a Young's modulus in the sheet-width direction is more than or equal to 135 GPa, and tensile strength in the sheet-width direction is more than or equal to 1100 MPa,[O]eq=[O]+2.77[N] Expression (1).
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机译：提供一种α+β钛合金热轧板，以质量％计，Al：4.7〜5.5％，Fe：0.5〜1.4％，N：0.03％以下，Si：0.15〜0.40％， Si / O之比：0.80〜2.80，表达式（1）中的[O] eq ：大于或等于0.13％且小于0.25％，余量：Ti和杂质。在ND方向表示热轧板的法线方向的情况下，TD方向表示热轧板的板宽方向的方向，c轴方向表示在该方向上的（0001）面的法线方向。在α相中，XND代表c轴取向与ND方向成30°范围的晶粒在X射线（0002）反射相对强度中最强的强度，而XTD代表在x射线（0002）反射强度中最强的强度。 c轴方向在TD方向上处于±10度范围内，XTD / XND大于或等于4.0，片材宽度方向上的杨氏模量大于或等于135 GPa，并且拉伸片材宽度方向的强度大于或等于1100 MPa，<？in-line-formulae description =“在线公式” end =“ lead”？> [ O] eq = [ O ] +2.77 [ N] 表达式（1）。<？in-line-formulae description =“ In-line Formulae” end =“ tail”？>
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