Glassy embrittlement of chromium metal and its improved ductility by alloying elements
铬金属的玻璃脆化及其通过合金元素改善的延展性
基本信息
- 批准号:05650671
- 负责人:
- 金额:$ 1.41万
- 依托单位:
- 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:
- 关键词:
项目摘要
Chromium and its alloys are ones of the promising high temperature materials since they exhibit the excellent combination of low density, high creep strength and good oxidation resistence at high temperatures. However, there is still a large barrier to the practical use because of the poor ductility at room temperature. The purposes of this study are two-fold. One is to elucidate the mechanism for the embrittlement of chromium experimentally using a bend test and a small punch test. The other is to investigate a method for improving the ductility by the addition of alloying elements into chromium.As the result, it was found that plasticity of high-purity polycrystalline chromium was dependent largely on surface imperfections. The existence of small cracks on the surface induced it to be very brittle. Also, large environmental effects were observed on the ductility chromium. For example, the moisture existing in the test environment increased the ductility of pure chromium, which is in contrast to the observations in other metallic materials such as intermetallic compounds (e. g., FeAl TiAl) . In addition, it was shown for the first time that pure chromium exhinbited hydrogen embrittlement. All these phenomena observed in pure chromium were also found in Chromium alloys. Furthermore, the vanadium addition was shown to be most effective in improving the ductility of chromium among a variety of alloying elements including 3d, 4d and 5d transition metals. Thus, the present results provided us important information on the method for improving the ductility of chromium.
铬及其合金具有密度低、蠕变强度高、高温抗氧化性好等优点,是一种很有发展前途的高温材料。然而,由于其在室温下的延性较差,其实际应用仍有很大的障碍。这项研究的目的有两个。一种是通过弯曲试验和小冲孔试验来阐明铬的脆化机理。另一种是通过在铬中添加合金元素来改善塑性的方法。结果发现,高纯多晶铬的塑性在很大程度上取决于表面缺陷。表面小裂缝的存在使它变得非常易碎。此外,还观察到了环境对塑性铬的影响。例如,试验环境中存在的水分增加了纯铬的延展性,这与在其他金属材料中观察到的情况相反,如金属间化合物(如FeAl-TiAl)。此外,首次发现纯铬对氢脆有一定的抑制作用。在纯铬中观察到的所有这些现象也在铬合金中发现。此外,在包括3d、4d和5d过渡金属在内的各种合金元素中,添加钒对改善铬的延展性是最有效的。因此,本研究结果为改善铬的延展性提供了重要的信息。
项目成果
期刊论文数量(24)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
M.Morinaga,T.Nambu,J.Fukumori,M.Kato,T.Sakaki,Y.Matsumto,Y.Torisaka and M.Horihata: "“Effect of Surface Imperfections on the Ductility of Pure Chromium"" J.Materials Science. (in press).
M. Morinaga、T. Nambu、J. Fukumori、M. Kato、T. Sakaki、Y. Matsumto、Y. Torisaka 和 M. Horihata:““表面缺陷对纯铬延展性的影响””J.Materials Science (在新闻)。
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M.Morinaga, T.Nambu, J.Fukumori, M.Kato, T.Sakaki, Y.Matsumoto, Y.Torisaka and M.Horihata: "Effect of Surface Imperfections on the Ductility of Pure Chromium" J.Materials Science. (in press).
M.Morinaga、T.Nambu、J.Fukumori、M.Kato、T.Sakaki、Y.Matsumoto、Y.Torisaka 和 M.Horihata:“表面缺陷对纯铬延展性的影响”J.Materials Science。
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M.Morinaga,T.Nambu,J.Fukumori,M.Kato,T.Sakaki,Y.Matsumto,Y.Torisaka and M.Horihata: "Effect of Surface Imperfectionson the Ductility of Pure Chromium." J.Materials Science. in press.
M.Morinaga、T.Nambu、J.Fukumori、M.Kato、T.Sakaki、Y.Matsumto、Y.Torisaka 和 M.Horihata:“表面缺陷对纯铬延展性的影响”。
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松本佳久、森永正彦、南部智憲: "高純度クロム圧延材の延性に及ぼす焼鈍効果" 大分工業専門学校研究報告. 31. 63-68 (1995)
Yoshihisa Matsumoto、Masahiko Morinaga、Tomonori Nanbu:“退火对高纯铬轧制材料延展性的影响”大分工业大学研究报告31. 63-68 (1995)。
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松本佳久、森永正彦、南部智憲、福森淳三、榊 孝: ""高純度圧延クロムの延性-脆性遷移挙動に及ぼす環境効果"" 鉄と銅. 81. 237-242 (1995)
Yoshihisa Matsumoto、Masahiko Morinaga、Tomonori Nanbu、Junzo Fukumori 和 Takashi Sakaki:“环境对高纯轧制铬的延性-脆性转变行为的影响”《铁和铜》81. 237-242 (1995)。
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MORINAGA Masahiko其他文献
MORINAGA Masahiko的其他文献
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{{ truncateString('MORINAGA Masahiko', 18)}}的其他基金
Energy Expression of the Chemical Bond between Atoms in Rare Earth Metal Compounds and Its Application to the Design of Hydrogen Storage Materials
稀土金属化合物原子间化学键的能量表达及其在储氢材料设计中的应用
- 批准号:
16K06711 - 财政年份:2016
- 资助金额:
$ 1.41万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Approach to the Understanding of Hydrogen Embrittleness of Steels Using Energy Expression of the Chemical Bond and Its Application to Quantum Alloy Design
利用化学键能量表达理解钢氢脆性的方法及其在量子合金设计中的应用
- 批准号:
22560658 - 财政年份:2010
- 资助金额:
$ 1.41万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Versatile Analyses in Atomic Scale of Metals and Alloys with High-Density Lattice Defects
具有高密度晶格缺陷的金属和合金原子尺度的多功能分析
- 批准号:
18062003 - 财政年份:2006
- 资助金额:
$ 1.41万 - 项目类别:
Grant-in-Aid for Scientific Research on Priority Areas
A unified understanding of the chemical bond in hydrogen storage materials by electron density distributions and its application to quantum materials design
通过电子密度分布统一理解储氢材料中的化学键及其在量子材料设计中的应用
- 批准号:
17106008 - 财政年份:2005
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$ 1.41万 - 项目类别:
Grant-in-Aid for Scientific Research (S)
Nature of chemical bond in view of electron density distributions and a new expression for cohesive mechanism between atoms in metalcompounds
从电子密度分布来看化学键的性质以及金属化合物中原子间内聚机制的新表达
- 批准号:
14205091 - 财政年份:2002
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$ 1.41万 - 项目类别:
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Degradation of alloy properties by super purification and optimum design of advanced steels by the best use of impurity elements
通过超净化降低合金性能,并通过杂质元素的最佳利用来优化设计先进钢
- 批准号:
11305050 - 财政年份:1999
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$ 1.41万 - 项目类别:
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Characteristics of hydrogen storage alloys in view of molecular orbital method and design of magnesium-based alloys with high hydrogen capacity
分子轨道法储氢合金特性及高氢容量镁基合金设计
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09450260 - 财政年份:1997
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Measurement of Intrinsic Mechanical Properties of Brittle Metallic Materials with Ideally Clean Surface and Approach to Environmental Brittlement
具有理想清洁表面的脆性金属材料的固有机械性能的测量和环境脆化的方法
- 批准号:
07455279 - 财政年份:1995
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$ 1.41万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Molecular Orbital Approach to the Design of Corrosion Resistant Zirconiuim Alloys for Nuclear Applications
核应用耐腐蚀锆合金的分子轨道方法设计
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07555500 - 财政年份:1995
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$ 1.41万 - 项目类别:
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An Electronic Approach to the Prediction of the Mechanical Properties of Aluminium Alloys and its Application to the Design of High Strength Alloys
预测铝合金机械性能的电子方法及其在高强度合金设计中的应用
- 批准号:
04555172 - 财政年份:1992
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$ 1.41万 - 项目类别:
Grant-in-Aid for Developmental Scientific Research (B)
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