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2014新著：超细晶粒刚的断裂韧性机制（英文版）
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Analysis of Fracture Toughness Mechanism in Ultra-fine-grained Steels: The Effect of the Treatment Developed in NIMS Author(s): Toshihiro Hanamura, Hai Qiu (auth.) Series: NIMS Monographs Publisher: Springer Japan Year: 2014 Language: English Pages: X, 64 p. 47 illus. In this book, advanced steel technologies mainly developed at the National Institute for Materials Science (NIMS), Japan, for structure control, mechanical properties, and the related mechanisms are introduced and discussed. NIMS has long worked on developing advanced steel techniques, namely, producing advanced steels by using only simple alloying elements such as carbon, manganese, and silicon, and also by utilizing steel scrap. The hope is that this approach will lead to a technology of a so-called steel-to-steel recycling process, with the ultimate goal of a recycling process such as an automotive-steel-to-automotive-steel recycling process to take the place of the current cascade-type recycling system. The main idea is to utilize ultra-grain refining structures and hetero structures as well as martensite structures. In particular, the focus of this book is on tensile strength and toughness of advanced steels from both the fundamental and engineering points of view. Fundamentally, a unique approach to analysis is taken, based on fracture surface energy as effective grain size is employed to better understand the mechanism of property improvement. From the engineering point of view, in fracture toughness such factors as crack tip opening displacement (CTOD) of advanced steels are evaluated in comparison with those of conventional steels. Table of contents : Content: Front Matter....Pages i-x Introduction: Issues Concerning Environmental Problems and Related Advanced Steel Techniques....Pages 1-7 Ultra-Fine Grained Steel: Relationship Between Grain Size and Tensile Properties....Pages 9-25 Ultra-Fine-Grained Steel: Relationship Between Grain Size and Impact Properties....Pages 27-47 Ultra-Fine-Grained Steel: Fracture Toughness (Crack-Tip-Opening Displacement)....Pages 49-62 Summary....Pages 63-64 |
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2015-01-24 10:13:34, 4.03 M
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