Distinct fatigue crack propagation limit of new precipitation-hardened aluminium alloy

详细信息	查看全文 | 推荐本文 |

• 作者：Takahiro Shikama^a ; Yoshimasa Takahashi^b ; Lei Zeng^c ; Shinji Yoshihara^a ; Tadashi Aiura^a ; Kenji Higashida^d ; Hiroshi Noguchi^c ; ^{nogu@mech.kyushu-u.ac.jp}
• 关键词：Aluminium alloys ; Fatigue crack propagation limit ; Fatigue test ; Portevin&ndash ; Le Chatelier effect ; Strain aging
• 刊名：Scripta Materialia
• 出版年：2012
• 期刊代码：157_13596462
• 类别：et
• 出版时间：July, 2012
• 卷：67
• 期：1
• 页码：49-52
• 文件大小：424 K

摘要

New aluminium alloys were developed by adding excess Mg to the ordinary precipitation-hardened aluminium alloy, JIS 6061-T6. By analyzing the results of the fatigue tests and the coaxing effect test, the existence of a distinct fatigue crack propagation limit in these new aluminium alloys was confirmed using a small-holed specimen. Moreover, by comparing the fatigue process with that of the 6061 alloy, the possibility of generating the fatigue limit in face-centred cubic metals, which has been considered to be absent, was discussed.