6061-T6鋁合金T型惰性氣體鎢極電弧銲接件之疲勞性質研究

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6061-T6鋁合金T型惰性氣體鎢極電弧銲接件之疲勞性質研究

徐逢邑 , Masters　　Advisor：黃俊仁　　

繁體中文

6061-T6 ；鋁合金；氣體鎢極電弧銲；疲勞壽命

Abstract │ Reference (31) │ Altmetrics

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In this study, 6061-T6 aluminum alloy was welded in T joint by inert gas tungsten arc welding (TIG welding). The fatigue properties of the welded joints under constant and variable amplitude loading were obtained and compared with international standard of welding.
  The results showed the fracture of the 6061-T6 T joint were observed at the Heat-Affected Zone (HAZ), where showed the lowest microhardness of fatigue test specimens. The fatigue strength of welded joints are higher than the fatigue design curves, which provided from three international welding standard, IIW, Eurocode 9 and BS 8118, respectively. In the short life region, we can find the experiment of fatigue strength data are more conforming to the fatigue design curve of IIW than the other two standards. Overall, the fatigue strength data of the three standard of welding are more conservative than the experiment of results.
  Under variable amplitude loading, effect of mean stress should be taken into consideration when the fatigue life of welded joints predicted. The Goodman modification was more consistent with the experiment results than Gerber modification.

Reference ( 31 ) 〈TOP〉

[1] H. O. Fuchs, ―Metal Fatigue in Engineering,‖ John-Wiley & Sons Inc. 1980.
連結：
[4] 趙光榮，「氬氣鎢極電銲能力本位訓練教材_鋁板平銲機本銲道銲接」，行政院勞工委員會職業訓練局，民國90年。
連結：
[6] X. H. Wang, J. T. Niu, S. K. Guan, L. J. Wang, D. F. Cheng, ―Investigation on TIG welding of SiCp-reinforced aluminum–matrix composite using mixed shielding gas and Al–Si filler,‖ Materials Science and Engineering, Vol. 499, pp. 106-110, 2009.
連結：
[7] 唐自勇，「A7050 與A2024 鋁合金異質銲接與銲後熱處理」，國立交通大學，碩士論文，民國100年。
連結：
[8] X. Hou, X. Yang, L. Cui, G. Zhou, ―Influences of joint geometry on defects and mechanical properties of friction stir welded AA6061-T4 T-joints,‖ Materials and Design, Vol. 53, pp. 106-117, 2014.
連結：

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