Effect of additional magnesium on mechanical and high-cycle fatigue properties of 6061–T6 alloy

Material type: 文書・図像類

Author: 高橋, 可昌ほか

Publisher: Elsevier

Publication date: 2015-06-20

Material Format: Digital

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Note (General)：: The effect of additional solute magnesium (Mg) on mechanical and high-cycle-fatigue properties of 6061-T6 aluminum alloy is investigated in detail. By...

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Material Type: 文書・図像類
Title: Effect of additional magnesium on mechanical and high-cycle fatigue properties of 6061–T6 alloy
Author/Editor: 高橋, 可昌
志鎌, 隆広
中道, 亮太
川田, 祐司
笠置, 尚暉
西岡, 浩成
北, 周三郎
宅間, 正則
野口, 博司
Author Heading: 高橋, 可昌
志鎌, 隆広
中道, 亮太
川田, 祐司
笠置, 尚暉
西岡, 浩成
北, 周三郎
宅間, 正則
野口, 博司
Publication, Distribution, etc.: Elsevier
Publication Date: 2015-06-20
Publication Date (W3CDTF): 2015-06-20
Periodical title: Materials Science and Engineering A
No. or year of volume/issue: 641
Volume: 641
Pages: 263-273
ISSN (Periodical Title): PISSN : 09215093
Text Language Code: eng
Subject Heading: 6061-T6 alloys
Solute magnesium
Work-hardening
Strain-aging
Fatigue limit
Coaxing effect
関西大学
Kansai University
平成25年度関西大学若手研究者育成経費
Target Audience: 一般
Note (General): The effect of additional solute magnesium (Mg) on mechanical and high-cycle-fatigue properties of 6061-T6 aluminum alloy is investigated in detail. By adding 0.5% and 0.8% Mg to the 6061-T6 alloy with a normal stoichiometric Mg2Si composition (base alloy), the alloy exhibits eminent strain-aging characteristics demonstrated by the emergence of serrated flow, the negative strain-rate-sensitivity and relatively weakened temperature dependency of flow stress. The Mg-added new alloy also shows higher work-hardening rate than the base alloy particularly at initial flow regime and at lower strain rate. The S-N curve of the new alloy shows a clear fatigue limit which is absent in the base alloy. The fatigue limit of the new alloy is shown to be controlled by the threshold against small crack growth. Moreover, the new alloy clearly exhibits a coaxing phenomenon (time-dependent strengthening) which is absent in the base alloy. The coaxing effect is attributed to the existence of a small quasi-non-propagating crack whose growth resistance gradually increases during stress amplitude step-ups.
This study was financially supported in part by the Kansai University Grant-in-Aid for progress of research in graduate course (2012) and also by the Kansai University Expenditures for Support of Training Young Scholars (2013).
Access Restrictions: 限定公開
Rights (production): This is a preprint submitted to Materials Science and Engineering: A. Publisher's version is available from http://doi.org/10.1016/j.msea.2015.06.051.
(C) Elsevier
Is Version Of (DOI): 10.1016/j.msea.2015.06.051
http://hdl.handle.net/10112/10313
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 関西大学 : 関西大学学術リポジトリ