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    188宝金博页面版: The Coming of Grain Boundary Engineering in the 21st Century

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    内容提示： 43 A. Haldar, S. Suwas, and D. Bhattacharjee (eds.), Microstructure and Texture in Steels, ? Springer 2009 Chapter 4 The Coming of Grain Boundary Engineering in the 21st Century Tadao Watanabe, Sadahiro Tsurekawa, Xiang Zhao, and Liang Zuo Abstract. This paper will discuss the background and the basic concept of the grain boundary engineering (GBE) proposed by one of the present authors in the early 1980s. It is shown that the grain boundary microstructure which can be quantitatively described by newly i...

    文档格式：PDF | 页数：40 | 浏览次数：30 | 上传日期：2017-04-09 11:19:42 | 文档星级：
    43 A. Haldar, S. Suwas, and D. Bhattacharjee (eds.), Microstructure and Texture in Steels, © Springer 2009 Chapter 4 The Coming of Grain Boundary Engineering in the 21st Century Tadao Watanabe, Sadahiro Tsurekawa, Xiang Zhao, and Liang Zuo Abstract. This paper will discuss the background and the basic concept of the grain boundary engineering (GBE) proposed by one of the present authors in the early 1980s. It is shown that the grain boundary microstructure which can be quantitatively described by newly introduced microstructural parameters, i.e. the grain boundary character distribution (GBCD) and the grain boundary connec-tivity, can bridge the gap between structure-dependent properties of individual grain boundaries and bulk properties of polycrystalline materials. In order to prove the importance of GBCD and its applicability to GBE, we overview basic studies of GBE performed in the last two decades, showing the GBCD-controlled bulk properties and possible factors affecting GBCD, such as the grain size, tex-ture, material purity/composition, for various kinds of materials including ferrous and non-ferrous materials. Recent achievements of GBE for structural materials are discussed paying a particular attention to the control of intrinsic and extrinsic brittleness caused by structure-dependent intergranular fracture. As the most re-cent successful achievements, GBE by high magnetic field applications is intro-__________________________________ T. Watanabe Visiting Professor, Key Laboratory of Anisotropy and Texture of Materials, Northeastern Uni-versity, Shenyang, 110004, China, formerly Laboratory of Materials Design and Interface Engi-neering, Department of Nanomechanics, Graduate School of Engineering, Tohoku University, Sendai, Japan S. Tsurekawa Faculty of Engineering, Kumamoto University, Kumamoto, Japan X. Zhao Key Laboratory of Anisotropy and Texture of Materials, Northeastern University, Shenyang, 110004, China L. Zuo Key Laboratory of Anisotropy and Texture of Materials, Northeastern University, Shenyang, 110004, China

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