Examination of the origin of the peculiar anomalous strengthening behavior appeared in some Ni-solid solution alloys

某些镍固溶体合金中出现的特殊异常强化行为的起源研究

• 批准号: 22760540
• 负责人: HAGIHARA Koji
• 金额: $ 2.75万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22760540/
• 关键词: 短範囲規則構造(SRO); 異常強化; 塑性変形; Ni基超合金; 転位; 単結晶; 高温変形; TEM

We examined the plastic deformation behavior of Ni-22Cr-8W(at.%), Ni-8W, and Ni-5Re Ni-solid solution alloy single crystals. We first found that yield stress anomaly(YSA) appears in Ni-22Cr-8W(at.%) and Ni-8W single crystals in which the solute atoms form the short-range ordered(SRO) structure. The peak temperature of the YSA is considered to be related to the thermal stability of the SRO. The control of SRO has a potential to improve the high-temperature strength of the materials by inducing the deformation behavior different from those in solid-solution alloys and fully ordered alloys.

研究了Ni-22 Cr-8 W（at.%）合金的塑性变形行为，Ni-8 W和Ni-5 Re Ni固溶体合金单晶。首次发现Ni-22 Cr-8 W（at.%）合金中存在屈服应力异常（YSA）。以及其中溶质原子形成短程有序（SRO）结构的Ni-8 W单晶。YSA的峰值温度被认为与SRO的热稳定性有关。SRO的控制有可能通过诱导不同于固溶体合金和完全有序合金的变形行为来提高材料的高温强度。

项目成果

Plastic deformation behavior of Ni_3(Ti_<0. 7> Nb_<0. 3>) single crystals with D0_<19> structure

D0_<19>结构Ni_3(Ti_<0. 7> Nb_<0. 3>)单晶的塑性变形行为

• 发表时间: 2010
• 期刊: Intermetallics
• 影响因子: 4.4
• 作者: K. Hagihara;H. Fujimoto;T. Nakano and Y. Umakoshi
• 通讯作者: T. Nakano and Y. Umakoshi

Change in Microstructure by Heat-Treatment and Corresponding Deformation Behavior in Ni3V Single Crystals

Ni3V单晶热处理引起的微观结构变化及相应的变形行为

• DOI: 10.4028/www.scientific.net/msf.638-642.1318
• 发表时间: 2010
• 期刊: Materials Science Forum
• 作者: K. Hagihara;M. Mori;T. Kishimoto;Y. Umakoshi
• 通讯作者: Y. Umakoshi

γ固溶体型Ni-(W,Re)合金単結晶の塑性変形挙動

γ固溶体型Ni-(W,Re)合金单晶的塑性变形行为

• 发表时间: 2011
• 作者: 濱洋一郎;藤江勇太;萩原幸司
• 通讯作者: 萩原幸司

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Plastic deformation behavior of Ni_3(Ti_<0.7>Nb_<0.3>) single crystals with D0_<19> structure

D0_<19>结构Ni_3(Ti_<0.7>Nb_<0.3>)单晶的塑性变形行为

• 发表时间: 2010
• 期刊: Intermetallics
• 影响因子: 4.4
• 作者: K.Hagihara;H.Fujimoto;T.Nakano;Y.Umakoshi
• 通讯作者: Y.Umakoshi