Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 289, Issue 1-2, Pages 41-53Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0921-5093(00)00906-0
Keywords
hydrogen; processing; thermohydrogen processing (THP); hydrogen decrepitation (HD); phase transformations
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Under certain conditions, hydrogen can degrade the mechanical properties and fracture behavior of most structural alloys; however, it also has some positive effects in metals. Several current and potential applications of hydrogen for enhancing the production and processing of materials are reviewed. These include thermohydrogen processing (THP) and forming of refractory alloys, processing of rare earth-transition metal magnets by hydrogen decrepitation (HD) and hydrogenation-decomposition-desorption-recombination (HDDR), hydrogen-induced amorphization (HIA) and microstructural refinement, extraction of elements from ores and alloys. and the use of hydrogen as a reducing gas for welding and brazing. Hydrogen is found to enhance the formability. microstructure and properties of a large variety of materials, including steels, Ti-based alloys and metal matrix composites (MMCs), refractory metals and alloys, rare earth-transition metal alloys, metalloid-containing metallic glasses, etc. (C) 2000 Elsevier Science S.A. All rights reserved.
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