OS2021 欠陥を有するMg合金の引張強さの評価(OS20-4 疲労と強度,OS-20 HCP金属の実験力学と計算力学)

石名 敏之, 濱田 繁, 野口 博司

研究成果: Contribution to journalArticle

抄録

It is difficult to evaluate the strength of material which has defects, because the strength differs variously by the stress concentration, the defects size and the temperature. In this study, the evaluation method for material with defects was studied. As an example, non-combustible magnesium alloys to which some silicon was added were applied. At first, observation of the fracture surfaces of specimens with a small hole was carried out. Although some dimple can be observed near the hole on the fracture surface of specimen tested in 250℃, no dimple was in room temperature. By the observation it was clarified that the fracture mode near the defect can be divided into two modes, i.e. brittle fracture and ductile fracture. In addition, by tensile tests of specimens with a notch, change of the fracture mode was also observed by degree in stress concentration. Understanding the two problems, i.e. degree in stress concentration of the defects in material and relationship between the defects size and strength are future tasks.
寄稿の翻訳タイトルOS2021 Strength Evaluation Method in Magnesium Alloy with Defect
本文言語Japanese
ページ(範囲)_OS2021-1_-_OS2021-3_
ジャーナルM&M材料力学カンファレンス
2011
0
DOI
出版ステータス出版済み - 2011

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