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タイトル: 微細再結晶粒および亜結晶粒組織を有する2種類のAl-Zn-Mg-Cu系合金の引張特性と耐SCC特性
その他のタイトル: On Tensile Properties and SCC Resistance of Two Al-Zn-Mg-Cu System Alloys Having Fully Recrystallized Fine-Grained and Un-Recrystallized Sub-Grained Structures
著者: 松岡, 秀明
広瀬, 幸雄 link image
岸, 陽一
東, 健司
Matsuoka, Hideaki
Hirose, Yukio
Kishi, Yoichi
Higashi, Kenji
発行日: 1996年 5月15日
出版社(者): 日本材料学会
雑誌名: 材料=Journal of the Society of Materials Science, Japan
ISSN: 0514-5163
巻: 45
号: 5
開始ページ: 537
終了ページ: 543
キーワード: Stress corrosion cracking
Hydrogen embrittlement
Grain boundary
Crack nucleation
SCC life
Grain size
Tensile property
抄録: Two types of Al-Zn-Mg-Cu system alloys with different microstructures, i.e., a fully recrystallized fine-grain and an un-recrystallized sub-grain, were prepared to investigate their tensile properties and stress corrosion cracking, SCC, resistance. The former is the superplastic material(SP), and the latter is a typical one of the commercial materials(CM). The effects of grain shapes and orientation on SCC resistance were discussed on the basis of the SCC test and fractography. The main results obtained in the present work are as follows:(1)When the orientations, L and T, of specimens were in agreement to rolling direction, the values of mechanical Young's modulus, tensile strength and 0.2 % proof stress of both SP and CM materials were nearly equal. However, the elongation of CM material was higher than SP one. (2)The nucleation time and life of SCC on L-and T-directions of CM material were longer than those of SP one. SCC resistance in the CM material was superior to that in the SP material. (3)Anisotropy of specimen orientation for SCC life was not observed in the SP material. In the CM material, on the other hand, SCC life on L-direction was longer than that of T-direction. The anisotropy on SCC life observed in the CM material seemed to be related to an easy separation of interfaces between the matrix and the inclusions having Fe and Si elements existing continuously along the grain boundaries by hot rolling.
URI: http://hdl.handle.net/2297/12325
関連URI: http://ci.nii.ac.jp/naid/110002293039/
資料種別: Journal Article
権利関係: 日本材料学会;本文データは日本材料学会の許諾に基づきCiNiiから複製したものである
版表示: publisher

このアイテムを引用あるいはリンクする場合は次の識別子を使用してください。 http://hdl.handle.net/2297/12325



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