Trade-off Balancing between Strength and Toughness of Multi-Phase alloys containing Brittle Phases

含脆性相的多相合金的强度和韧性之间的权衡

• 批准号: 12305044
• 负责人: MISHIMA Yoshinao
• 金额: $ 28.26万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12305044/
• 关键词: trade-off balancing; strength; toughness; intermetallic compound; microstructure control; alloy design; multi-Phase alloys; 靱性(じん性)

Trade-off balancing between strength and toughness has been systematically investigated in alloys having brittle an intermetallic phase in a ductile matrix or having a ductile phase within the brittle intermetallic matrix. The systems investigated include Nb-Si base alloy, Fe-base ferritic alloys, an austenitic Fe-Mn-Al-C alloys, Cu-alloys and an Al-Fe alloy. The Nb-Si alloys consist of brittle Nb_5Si_3 and a ductile Nb solid solution phase in a mixed lamellar morphology, which is a candidate material for ultra-high temperature application such as components in gas-turbine engines. Both high temperature strength and room temperature toughness of the alloy depend on the morphology and spacings of the lamellar microstructure. A method for optimization of trade-off properties has been successfully suggested with a consideration on the toughening mechanism by the ductile phase in a brittle matrix.Similar investigation was made in the Fe-Cr base ferritic alloys in which the Laves phase is the strengthening agent, and also in Fe-Mn-Al-C in which the strengthening is achieved by the precipitation of E2_1-type intermetallic compound. In both cases change in morphology of the brittle phase in relation to the crystallographic orientation and misfit between two-phases control the strength and toughness, or ductility of the alloys.The present work successfully provides many valuable basic information on the microstructure-mechanical properties of advance metallic materials that helps in designing the alloys for various structural applications.

在韧性基体中具有脆性金属间相或在脆性金属间基体中具有韧性相的合金中，已经系统地研究了强度和韧性之间的权衡平衡。所研究的系统包括Nb-Si基合金、Fe基铁素体合金、奥氏体Fe-Mn-Al-C合金、Cu合金和Al-Fe合金。Nb-Si合金是由脆性Nb_5Si_3和韧性Nb固溶体相组成的混合片层结构，是一种超高温应用的候选材料，如燃气涡轮发动机部件。合金的高温强度和室温韧性取决于片层组织的形貌和间距。本文提出了一种综合考虑脆性基体中韧性相增韧机理的性能优化方法，并对以Laves相为强化剂的Fe-Cr基铁素体合金和以E2_1型金属间化合物沉淀强化的Fe-Mn-Al-C合金进行了类似的研究。在这两种情况下，脆性相形态与晶体取向相关的变化以及两相之间的错配控制了合金的强度和韧性或延展性。本工作成功地提供了许多有关先进金属材料微观结构-力学性能的有价值的基本信息，有助于设计适用于各种结构应用的合金。

项目成果

Plastic deformation of Al13Fe4 particles in Al–Al13Fe4 by high-speed compression

• DOI: 10.1016/s0921-5093(02)00712-8
• 发表时间: 2003-06
• 期刊: Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
• 影响因子: 6.4
• 作者: N. Yoneyama;K. Mizoguchi;S. Kumai;A. Sato;M. Kiritani

Precipitation of the icosahedral quasicrystalline phase, R-phase and Laves phase in ferritic alloys

• DOI: 10.2320/matertrans.45.357
• 发表时间: 2004-02-01
• 期刊: MATERIALS TRANSACTIONS
• 影响因子: 1.2
• 作者: Yamamoto, K;Kimura, Y;Mishima, Y
• 通讯作者: Mishima, Y

Effect of grain-boundary GeO_2 particles on intergranular fracture of Cu-GeO_2 polycrystals

晶界GeO_2颗粒对Cu-GeO_2多晶沿晶断裂的影响

• 发表时间: 2003
• 期刊: Journal of Materials Science 38
• 作者: H.SATO;T.FUJII;S.ONAKA;M.KATO
• 通讯作者: M.KATO

Compressive Mechanical Properties of Multi-phase Alloys Based on B2 CoAl and E2_1 Co_3AlC

B2 CoAl和E2_1 Co_3AlC基多相合金的压缩力学性能

• 发表时间: 2000
• 期刊: Intermetallics 8
• 作者: Y.Kimura;M.Takahashi;H.Hosoda;S.Miura;Y.Mishima
• 通讯作者: Y.Mishima

Characterization of C11b/C40 Lamellar in a MoSi_2-15mol%TaSi_2Alloy

表征%20of%20C11b/C40%20层状%20in%20a%20MoSi_2-15mol%TaSi_2合金

• 发表时间: 2001
• 期刊: Intermatallics 9
• 作者: F.G.Wei;Y.Kimura;Y.Mishima
• 通讯作者: Y.Mishima