Investigation on Initiation and Development of Microscopic Inhomogeneity During Plastic Deformation of Polycrystalline Metals

多晶金属塑性变形过程中微观不均匀性的引发和发展研究

• 批准号: 11450045
• 负责人: ABE Takeji
• 金额: $ 6.46万
• 依托单位: OKAYAMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450045/
• 关键词: Polycrystalline Metals; Plastic Deformation; Inhomogeneous Deformation; Ultra-Micro Hardness Tester; Stylus Surface Roughness Measurement; Scanning Laser Microscope; Simulation; Finite Element Method; レーザー顕微鏡; 触診式粗さ測定器; 触針式表面あらさ測定器

Many of the metallic materials used for industry is polycrystalline and their deformation behavior is microscopically heterogeneous. Then, it is important to study the microscopic deformation behavior of inhomogeneous material. In order to clarify the deformation behavior of inhomogeneous material, it is necessary to study the distribution of stress or strain, the influence of the geometry of the constituents and the relation between local microscopic deformation and the global deformation behavior of the material. The aim of the present study is to clarify by experiments and numerical analysis various features of microscopic plastic deformation.Hardness testing is one of the fundamental methods to examine the characteristics of materials. The local material characteristic can be estimated with the hardness measurement. Recently, the ultra-micro hardness testing equipment has been developed which makes it possible to measure the hardness with very small load. It is shown that the hardness values of respective grains in polycrystalline aluminum as well as their dispersion increase with the applied plastic strain. Discussion is made on the microscopic deformation behavior of polycrystalline aluminum.It is also shown that the characteristic feature of the plastic deformation of inhomogeneous material is well numerically simulated by the rigid-plastic finite element method.

工业上使用的许多金属材料是多晶的，它们的变形行为在微观上是不均匀的。因此，研究非均匀材料的细观变形行为具有重要意义。为了弄清非均匀材料的变形行为，需要研究材料的应力或应变分布、组分几何形状的影响以及材料的局部微观变形与整体变形行为之间的关系。本研究的目的是通过实验和数值分析来阐明微观塑性变形的各种特征。硬度测试是检测材料特性的基本方法之一。通过硬度测量可以估计局部材料特性。近年来，超显微硬度测试设备的发展使得在很小的载荷下测量硬度成为可能。结果表明，多晶铝中各晶粒的硬度值及其分散度随塑性应变的增加而增加。讨论了多晶铝的细观变形行为，表明刚塑性有限元法能较好地模拟非均匀材料塑性变形的特征。

项目成果

Takeji Abe, et al.: "Numerical Study on Deformation Behavior of Rigid-Plastic Inhomogeneous Material Using Three-Dimensional Models"Memoirs of Faculty of Engineering, Okayama Univ.. 36. 7-14 (2002)

Takeji Abe 等：“利用三维模型对刚性-塑性非均质材料的变形行为进行数值研究”冈山大学工学部回忆录.. 36. 7-14 (2002)

Takeji Abe, et al: "Ultra-Micro Hardness Testing and Microscopic Deformation of Polycrystalline Aluminum"Memoir of Faculty of Engineering, Okayama University. Vol.33. 9-19 (2001)

Takeji Abe等人：《多晶铝的超显微硬度测试和显微变形》冈山大学工学部回忆录。

Ryouji Kondou, Takeji Abe, Naoya Tada and Ichirou Shimizu: "Observation of Orientation Change During Plastic Deformation of Polycrystalline Copper by EBSD Method"Memoirs of Faculty of Engineering, Okayama Univ.. Vol.36, NO.1. 1-6 (2001)

Ryouji Kondou、Takeji Abe、Naoya Tada、Ichirou Shimizu：“通过 EBSD 法观察多晶铜塑性变形过程中的取向变化”冈山大学工学部回忆录。第 36 卷，NO.1。

Takeji Abe, et al.: "Ultra-Micro Hardeess Testing and Microscopic Deformation of Polycrystalline Aluminum"Memoir of Faculty of Engineering, Okayama University. 33. 9-19 (2001)

Takeji Abe等人：“多晶铝的超微硬度测试和微观变形”冈山大学工学部回忆录。

Ryouji Kondou, Takeji Abe, Naoya Tada, Ichirou Shimizu: "Observation of Orientation Change During Plastic Deformation of Polycrystalline Copper by EBSD Method"Memoirs of Faculty of Engineering, Okayama Univ.. 36. 1-6 (2001)

Ryouji Kondou、Takeji Abe、Naoya Tada、Ichirou Shimizu：“通过 EBSD 方法观察多晶铜塑性变形过程中的取向变化”冈山大学工学部回忆录. 36. 1-6 (2001)