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    • 3. 发明授权
    • Superplastically-formable Al-Mg-Si product and method
    • 超塑性Al-Mg-Si产品及方法
    • US6063210A
    • 2000-05-16
    • US919869
    • 1997-08-28
    • Dhruba J. ChakrabartiRoger D. Doherty
    • Dhruba J. ChakrabartiRoger D. Doherty
    • C22C21/06C22C21/08C22F1/047
    • C22F1/047C22C21/06C22C21/08Y10S420/902
    • A superplastically formable, aluminum alloy product which consists essentially of about 2-10 wt. % magnesium; at least one dispersoid-forming element selected from the group consisting of: up to about 1.6 wt. % manganese, up to about 0.2 wt. % zirconium, and up to about 0.3 w. % chromium; at least one nucleation-enhancing element for recrystallization selected from: up to about 1.0 wt. % silicon, up to about 1.5 wt. % copper, and combinations thereof. Said alloy product has greater than about 300% elongation at a strain rate of at least about 0.0003/sec and a superplastic forming temperature between about 1000-1100.degree. F. due, in part, to the preferred thermomechanical processing steps subsequently applied thereto. A related method of manufacture is also disclosed herein.
    • 一种超塑性成型的铝合金产品,其基本上由约2-10重量% %镁; 至少一种选自以下的分散质形成元素:至多约1.6重量% %锰,至多约0.2重量% %锆,最高约0.3w。 %铬; 至少一种用于重结晶的成核增强元素选自:至多约1.0wt。 %硅,高达约1.5重量% %铜及其组合。 所述合金产品在至少约0.0003 /秒的应变速率下具有大于约300%的伸长率,超塑性成形温度在约1000-1100°F之间,部分归因于随后施加于其上的优选的热机械加工步骤。 本文还公开了相关的制造方法。
    • 5. 发明授权
    • Nickel-cobalt based alloys
    • 镍钴合金
    • US4931255A
    • 1990-06-05
    • US279375
    • 1988-12-02
    • Roger D. DohertyRishi P. SinghJohn S. Slaney
    • Roger D. DohertyRishi P. SinghJohn S. Slaney
    • C22C19/00C22C19/05C22C19/07C22F1/10
    • C22C19/00C22C19/055C22C19/056C22C19/07C22F1/10
    • This invention relates to a nickel-cobalt alloy comprising the following elements in percent by weight:______________________________________ Carbon about 0-0.05 Molybdenum about 6-11 Iron about 0-1 Titanium about 0-6 Chromium about 15-23 Boron about 0.005-0.020 Columbium about 1.1-10 Aluminum about 0.4-4.0 Cobalt about 30-60 Nickel balance ______________________________________ the alloy having an electron vacancy number, N.sub.v, defined by N.sub.v =0.61 Ni+1.71 Co+2.66 Fe+4.66 Cr+5.66 Mo wherein the respective chemical symbols represent the effective atomic fractions of the respective elements present in the alloy, the value not exceeding the value N.sub.v =2.82-0.017 W.sub.Fe, wherein W.sub.Fe is the percent by weight of iron in the alloy.In one aspect, the alloy of the present invention is preferably finally cold worked at ambient temperature to a reduction in cross-section of at least 5% and up to about 40%, although higher levels of cold work may be used with some loss of thermomechanical properties. However, it may be cold worked at any temperature below the HCP-FCC transformation zone. After cold working, the alloys are preferably aged at a temperature between about 800.degree. F. (427.degree. C.) to about 1400.degree. F. (760.degree. C.) for about 4 hours. Following aging, the alloys may be air-cooled.In another aspect, the alloy of the present invention is aged at a temperature of from about 1200.degree. F. (650.degree. C.) to about 1652.degree. F. (900.degree. C.) for about 1-200 hours and then cold worked at ambient temperature to achieve a reduction in cross-section of at least 5% and up to about 40%. After cold working, the alloys are preferably aged at a temperature of from about 800.degree. F. (427.degree. C.) to about 1400.degree. F. (760.degree. C.) for about 4 hours. Following aging, the alloys may be air-cooled.
    • 6. 发明授权
    • Method for making a superplastically-formable AL-Mg product
    • 制造超塑性AL-Mg产品的方法
    • US06322646B1
    • 2001-11-27
    • US09592513
    • 2000-06-12
    • Dhruba J. ChakrabartiRoger D. Doherty
    • Dhruba J. ChakrabartiRoger D. Doherty
    • C22F1047
    • C22C21/06C22C21/08C22F1/047
    • A method for making a superplastically formable, aluminum alloy product which consists essentially of: about 2-3.8 wt. % magnesium; at least one dispersoid-forming element selected from the group consisting of: up to about 1.6 wt. % manganese, up to about 0.2 wt. % zirconium, and up to about 0.3 w. % chromium; at least one nucleation-enhancing element for recrystallization selected from: about 0.11-1.0 wt. % silicon, up to about 1.5 wt. % copper, and combinations thereof. Said alloy product has greater than about 300% elongation at a strain rate of about 0.0001-0.003/sec and a superplastic forming temperature between about 1000-1100° F. due, in part to the preferred thermomechanical processing steps applied to its intermediate plate or slab product forms.
    • 一种制造超塑性铝合金产品的方法,其主要由以下组成:约2-3.8wt。 %镁; 至少一种选自以下的分散质形成元素:至多约1.6重量% %锰,至多约0.2重量% %锆,最高约0.3w。 %铬; 至少一种用于重结晶的成核增强元素选自:约0.11-1.0wt。 %硅,高达约1.5重量% %铜及其组合。 所述合金产品在约0.0001-0.33 /秒的应变速率下具有大于约300%的伸长率,在超塑性成形温度在约1000-1100°F之间,部分是由于应用于其中间板的优选的热机械加工步骤 板坯产品形式。
    • 7. 发明授权
    • Alloys containing gamma prime phase and particles and process for
forming same
    • 含有γ原相和颗粒的合金及其形成方法
    • US5169463A
    • 1992-12-08
    • US657891
    • 1991-02-19
    • Roger D. DohertyRishi P. Singh
    • Roger D. DohertyRishi P. Singh
    • C22C19/05C22C19/07C22F1/10
    • C22C19/07C22C19/055C22C19/056C22F1/10
    • A work-strengthenable alloy which includes a gamma prime phase gamma prime particles comprising the following elements in percent by weight:______________________________________ molybdenum 6-16 chromium 13-25 iron 0-23 nickel 10-55 carbon 0-0.05 boron 0-0.05 cobalt balance, at least 20, ______________________________________ said alloy also containing one or more elements which form gamma prime phase with nickel,the electron vacancy number, N.sub.v, of the alloy being defined byN.sub.v =0.61 Ni+1.71 Co+2.66 Fe+4.66 Cr+566 Mo wherein the respective chemical symbols represent the effective atomic fractions of the respective elements present in the alloy, said value not exceeding the valueN.sub.v =2.82-0.017 W.sub.Fe, where W.sub.Fe is the percent by weight of iron in the alloy for those alloys containing no iron or less than 13 percent by weight iron and W.sub.Fe is 13 for the alloys containing from 13-23 percent by weight iron. The alloys are formed by a melt; and heating the alloy at a temperature of from 600.degree.-900.degree. C. for a time sufficient to form said gamma prime phase prior to strengthening said alloy by working it to achieve a reduction in cross-section of at least 5 percent. The gamma prime particles gave a cross-sectional size of at least 10 nanometers.
    • 一种可加工的合金,其包括以重量%计的以下元素的γ相γ伽马粒子:钼6-16-铬13-25-铁0-23-镍10-55-碳0-0.05-硼 0-0.05-钴平衡,至少20, - 所述合金还含有一个或多个与镍形成γ'相的元素,合金的电子空位数Nv由Nv = 0.61 Ni + 1.71 Co + 2.66 Fe + 4.66 Cr + 566 Mo,其中各化学符号表示合金中存在的相应元素的有效原子分数,所述值不超过值Nv = 2.82-0.017WFe,其中WFe是铁的重量百分数 对于含有13-23%(重量)铁的合金,对于不含铁或小于13%重量铁的合金,WFe为13。 合金由熔体形成; 并在600-900℃的温度下加热合金一段足以形成所述γ'相的时间,然后通过加工所述合金来实现至少5%的横截面减小。 γ原子粒子的横截面尺寸至少为10纳米。