Yusuke Kohigashi , Takafumi Amino , Tomoaki Hamaguchi , Daichi Akahoshi , Koji Moriguchi , Hiroyuki Semba , Kazuma Ito
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引用次数: 0
Abstract
Sulfur is considered an unfavorable element in metallic materials because of its potential to cause embrittlement, thereby prompting its removal. However, trace amounts of S impurities can influence the precipitation of the primary α-Cr strengthening phase in the heat-resistant 50Ni–30Cr–0.8Ti–6W–Fe alloy, and thus affect its creep strength. In this study, fine Ti2S particles were observed in heat-treated 50Ni–30Cr–0.8Ti–6W–Fe alloys through high-sensitivity, high-resolution, and wide-field element analysis using aberration-corrected scanning transmission electron microscopy. The Ti2S particles were distributed linearly with the adjacent α-Cr precipitates. The Ti2S precipitates functioned as nucleation sites for α-Cr, thereby refining and increasing the hardness of the alloy. The findings of this work challenge conventional approaches to material design and emphasize the significance of design based on fundamental principles.
期刊介绍:
Materialia is a multidisciplinary journal of materials science and engineering that publishes original peer-reviewed research articles. Articles in Materialia advance the understanding of the relationship between processing, structure, property, and function of materials.
Materialia publishes full-length research articles, review articles, and letters (short communications). In addition to receiving direct submissions, Materialia also accepts transfers from Acta Materialia, Inc. partner journals. Materialia offers authors the choice to publish on an open access model (with author fee), or on a subscription model (with no author fee).