M&M材料力学カンファレンス
Online ISSN : 2424-2845
セッションID: OS1805
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多軸クリープ試験に用いる溶接タイプミニチュア十字型試験片の設計
*旭吉 雅健若原 いつか坪山 響介張 聖徳伊藤 隆基坂根 政男
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This study describes the development of a welded-type miniature cruciform specimen used for multiaxial creep testing of Super304H stainless steel. The geometry of the preexist miniature cruciform specimen was modified to enable biaxial creep tests using a smaller material size with the assistance of welding technology. Finite element analyses and experimental results showed that the preexist miniature specimen made by welding had a limitation of giving a dissimilar deformation between X- and Y-direction in the equi-biaxial tension creep, depending on welding material. However, in the modified miniature creep specimen, the difference in the deformation between X- and Y-directions was suppressed within 2%. Also, the variations of X- and Y-directional stresses were within ±4% in the gauge part of the modified miniature creep specimen. The new geometry of the modified miniature specimen was verified to be testable in biaxial creep experiments for Super304H stainless steel.

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