Fabrication of 10 nm grained bulky material and the properties

10 nm晶粒大块材料的制备及其性能

• 批准号: 20560647
• 负责人: MIURA Hiromi
• 金额: $ 3.16万
• 依托单位: The University of Electro-Communications
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20560647/
• 关键词: ナノ構造; 強ひずみ加工; 多軸鍛造; 超微細粒; 変形双晶; ステンレス鋼; 銅合金; SUS316ステンレス鋼; マグネシウム合金

SUS304 and SUS316 stainless steels having low stacking fault energy were multi-directionally forged (MDF) at ambient temperature and 77 K, where lower MDF temperature would accelerate occurrence of mechanical twinning to cause grain refinement down to 20 nm. As the increase in cumulative strain of MDF, grain refinement proceeded by intersection of twins. This tendency was more obvious at lower temperature. Occurrence of martensitic transformation, however, hindered the grain refinement. The grain refinement and strength in the SUS304 stainless steel, therefore, were not so notable due to martensitic transformation compared with in the SUS316 one. The MDFed stainless steels possessed superior balance of strength and ductility, i.e., 1.8 GPa and 20 %.

具有低堆垛层错能的SUS304和SUS316不锈钢在环境温度和77 K下进行多向锻造（锻造），其中较低的锻造温度将加速机械孪晶的发生以导致晶粒细化至20 nm。随着双相累积应变的增加，晶粒细化以孪晶相交的方式进行。这种趋势在较低温度下更加明显。马氏体相变的发生阻碍了晶粒的细化。因此，与SUS316不锈钢相比，由于马氏体相变，SUS304不锈钢的晶粒细化和强度不那么显著。MDFed不锈钢具有强度和延展性的上级平衡，即，1.8 GPa和20%。

项目成果

Grain refinement in the surface layer of AZ31 Mg alloy sheet processed by cyclic bending

循环弯曲加工AZ31镁合金板材表层晶粒细化

• 发表时间: 2013
• 期刊: Reviews on Advanced Materials Science
• 影响因子: 3.6
• 作者: Zhang, Lei;Yang, Xuyue;Miura, Hiromi;Sakai, Taku
• 通讯作者: Sakai, Taku

Cu-Zn-Si合金の強圧延と変形双晶導入による組織制御と強度

强轧制和变形孪晶引入对 Cu-Zn-Si 合金的显微组织和强度的控制

• 发表时间: 2010
• 作者: 戸部裕史;金煕榮;宮崎修一;三浦博己,高橋芳幸,山口洋,神林浩一
• 通讯作者: 三浦博己,高橋芳幸,山口洋,神林浩一

Improvement of mechanical properties of AZ91Mg alloy by multi.directional forging and ultra grain refinement

多向锻造和超晶粒细化提高AZ91Mg合金力学性能

• 发表时间: 2010
• 作者: H.Miura;H.Liu
• 通讯作者: H.Liu

AZ91Mg合金の降温多軸鍛造による結晶粒超微細化と強度

冷却多轴锻造AZ91Mg合金的超细晶粒和强度

• 发表时间: 2009
• 作者: 三浦博己;劉恒詰
• 通讯作者: 劉恒詰

Nano-grain evolution in austenitic stainless steel during multi-directional forging

• DOI: 10.1016/j.msea.2010.10.018
• 发表时间: 2011-01-25
• 期刊: MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
• 影响因子: 6.4
• 作者: Nakao, Y.;Miura, H.
• 通讯作者: Miura, H.