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Single crystalline, μm-sized cantilevers are fabricated out of epitaxially grown Ag thin films by a lithography-based procedure and are deflected by a nanoindenter system. The microstructure of the plastically deformed cantile-vers is investigated using transmission Kikuchi diffraction (TKD) on the cantilever cross section. 3D discrete dislocation dynamics simulations (DDD) are performed for further analysis. A mechanism to explain the formation of dislocation networks upon loading is suggested.
This collection of papers focus on advanced methods for predicting and avoiding the occurrence of defects in manufactured products. A new feature is included, namely, the influence of the processing-induced defects on the integrity of structures.The following topics are developed: damage modeling; damage evaluation and rupture; strain localization and instability analysis; formability characterization; prediction of shape inaccuracies; influence of defects on structural integrity. The main manufacturing operations are covered and various materials are examined, such as new and conventional metal alloys, ceramics, polymers and composites.
This book presents a comprehensive review, evaluation, and summary of the dependence of mechanical properties on grain and particle parameters of monolithic ceramics and ceramic composites. Emphasizing the critical link between fabrication and ceramic performance, the book covers the grain dependence of monolithic properties and the dependence of ceramic, composite properties on grain and particulate parameters. It includes theoretical and conceptual background, pertinent models, experimental results, a data review, discussion, and a summary or recommendations. Illustrations feature microstructural details while graphs plot data on material hardness, compressive strength, and other pivotal variables.
This monograph written by two Chinese scientists of the younger generation opens a window into the world of thoughts on Mechanical Metallurgy in this fascinating area of our world, characterized by age old cultural heritage as weil as by its dynamic evolution into the future. Based on notions and names all so familiar to the western scientist, and regarding the subject from the point of view of the theoretical mechanical engineer (Yang) as weil as that of the materials and manufacturing engineer (Lee), the authors present a synthesis of both approaches and endeavour to guide the reader from basic theory to engineering applications. Between structural defects in the micrometer scale and the meter-measures of engineering components, the term of mesoplasticity is meant to place the reader right in the center: This is certainly achallenging enterprise, and the editor expresses his sincere wishes as to enrichment and stimulation which will emanate from this interesting book and its creative perspective. Prof. B. Ilschner March, 1993. Preface In the past two decades, enormous advances in materials and manufacturing tech nology have been achieved, which upgrade the material design, processing and precision manufacturing as quantitative and concise scientific disciplines. Rapid improvements on mechanics understanding have been instrumental in the above mentioned development. A topic of great interest and importance in plasticity re search has been the design and processing of materials themselves on the mesoscale to achieve the desired macroscopic properties.