Pengaruh Post-Weld Heat Treatment T6 Pada Laju Perambatan Retak Fatik Paduan Al 6013
| Main Author: | Perpustakaan UGM, i-lib |
|---|---|
| Format: | Article NonPeerReviewed |
| Terbitan: |
[Yogyakarta] : Universitas Gadjah Mada
, 2003
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/23186/ http://i-lib.ugm.ac.id/jurnal/download.php?dataId=6127 |
Daftar Isi:
- The effects of post-weId heat treatment T6 on the fatigue crack growth rate of aluminum alloy Al 6013 have been investigated. The investigation was performed under three material conditions : base metal, weld metal without heat treatment, and weld metal with heat treatment. Welding process used filler AI 5356 consisting of longitudinal butt joint and transversal butt joint. In addition, the post-weld heat treatment T6 involved solution treatment, quenching, and artificial aging. The test of fatigue crack growth rate was performed on two types of specimen: single edge crack specimen for longitudinal butt weld joint and center crack tension specimen for transversal butt weld joint. The test was performed on those specimens with a constant load amplitude at stress level of 20% and stress ratio of 0.3. The load frequency was adjusted from 5 to 15 Hz. The results were treated using seven incremental polynomial method according to the ASTM E-647 to obtain the fatigue crack growth rate curve (da/dN vs AK) and Paris equation. The results show that welding process can increase the fatigue crack growth rate of Al 6013, signed by the increase of n value from 3.25 to 3.93 for longitudinal butt joint, and from 3.09 to 3.70 for transversal butt joint. The post-weld heat treatment also increase the fatigue crack growth rate of AI 6013. The results also show that the strength, elongation, and hardness of Al 6013 decrease after the welding process and the post-weld heat treatment, and there is a change in micro structures that influence the fatigue crack growth rate of Al 6013. Keywords : Al 6013, post-weld heat treatment, longitudinal butt joint, transversal butt joint, artificial aging.