| 书目名称 | Lifetime Controlling Defects in Tool Steels | | 编辑 | Christian Rudolf Sohar | | 视频video | http://file.papertrans.cn/586/585960/585960.mp4 | | 概述 | Nominated by the Vienna University of Technology for a Springer Theses Prize.Presents an interdisciplinary approach to the investigation of manufactured tool steels in the gigacycle range.Provides an | | 丛书名称 | Springer Theses | | 图书封面 |  | | 描述 | .In this thesis Christian Sohar describes his investigation into the gigacycle fatigue behavior of tool steels. In an interdisciplinary approach he uses knowledge and methods from a wide variety of disciplines including materials science, metallurgy, chemistry, physics and mechanical engineering. Christian gives a general introduction into steel tools and fatigue in materials. Later he extensively discusses the experimental techniques and results. Indeed it is the detail of the content in this thesis which makes it an invaluable resource for students entering the field and scientists working in related disciplines. Overall, the thesis helps us understand more about the mechanical behavior of metallic materials with complex microstructure and high hardness.. | | 出版日期 | Book 2011 | | 版次 | 1 | | doi | https://doi.org/10.1007/978-3-642-21646-6 | | isbn_softcover | 978-3-662-50788-9 | | isbn_ebook | 978-3-642-21646-6Series ISSN 2190-5053 Series E-ISSN 2190-5061 | | issn_series | 2190-5053 | | copyright | Springer-Verlag Berlin Heidelberg 2011 |
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Front Matter |
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Abstract
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,Introduction, |
Christian Rudolf Sohar |
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Abstract
Tool steels are defined as “any steel” that is “used to make tools for cutting, forming, or otherwise shaping a material into a part or component adapted to a definite use”. Despite this definition, large quantities of tool steels are also used for non-tool applications, e.g. for springs, engine parts, bearings and magnetic components, since they offer excellent mechanical properties. The earliest tool steels were plain carbon steels, and only because production processes and technologies improved, it was possible to develop more and more highly alloyed steels with better properties. The history of tool steels will be covered in the subsequent section of this thesis. Nowadays, most tool steels contain large quantities of alloying elements, which range from carbide forming elements like molybdenum, tungsten, vanadium, and chromium to others like manganese and cobalt. The purpose of the alloying elements in the tool steels is the improvement of the mechanical properties in order to meet the ever increasing service demands of these steels, and to provide better dimensional control during the applied heat treatments.
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,Experimental, |
Christian Rudolf Sohar |
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Abstract
In the present work the fatigue behavior of five commercially available tool steels has been studied. The steels were acquired from Böhler Edelstahl GmbH (Austria) in annealed condition, also referred to as the “as-received” material. Two cold work tool steels (Böhler trade names K110 and K390) and three high speed steels (Böhler trade names S500, S600 and S590) were used. Steels K110, S500 and S600 are conventional (ingot metallurgy) tool steels, while K390 and S590 are produced by powder metallurgy (inert gas atomization + HIP).
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,Results and Discussion, |
Christian Rudolf Sohar |
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Abstract
In the introduction, the potential effect of residual stresses (RS) on the fatigue behavior has been discussed extensively. In this work, systematic residual stress investigations were performed evaluating RS depth profiles, tangential and axial stresses, homogeneity around the specimen circumference, mechanical removal of highly stressed layers and relaxation phenomena.
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,Summary and Outlook, |
Christian Rudolf Sohar |
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Abstract
This work describes investigations into the gigacycle fatigue behavior of tool steels, which were accomplished in the framework of a joint research project (FWF project P17650-N02) of Vienna University of Technology (Institute of Chemical Technologies and Analytics; Prof. Dr. H. Danninger) and University of Vienna (Faculty of Physics; Prof. Dr. B. Weiss). The principal researchers of this project were Dipl.-Ing. A. Betzwar-Kotas (University of Vienna) and the author of this thesis (Vienna Univerity of Technology).
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