N. H., Othman and M., Ishak and L. H., Shah (2017) Effect of shoulder to pin ratio on magnesium alloy Friction Stir Welding. In: Joining and Welding Symposium (JWS2017) , 11 July 2017 , Universiti Malaysia Pahang. pp. 1-9., 238 (1). ISSN 17578981
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Effect of shoulder to pin ratio on magnesium alloy Friction Stir Welding.pdf Available under License Creative Commons Attribution. Download (5MB) | Preview |
Abstract
This study focuses on the effect of shoulder to pin diameter ratio on friction stir welding of magnesium alloy AZ31. Two pieces of AZ31 alloy with thickness of 2 mm were friction stir welded by using conventional milling machine. The shoulder to pin diameter ratio used in this experiment are 2.25, 2.5, 2.75, 3, 3.33, 3.66, 4.5, 5 and 5.5. The rotational speed and welding speed used in this study are 1000 rpm and 100 mm/min, respectively. Microstructure observation of welded area was studied by using optical microscope. Equiaxed grains were observed at the TMAZ and stir zone indicating fully plastic deformation. The grain size of stir zone increased with decreasing shoulder to pin ratio from ratio 3.33 to 5.5 due to higher heat input. It is observed that, surface galling and faying surface defect is produced when excessive heat input is applied. To evaluate the mechanical properties of this specimen, tensile test was used in this study. Shoulder to pin ratio 5.5 shows lowest tensile strength while shoulder to pin diameter ratio 3.33 shows highest tensile strength with weld efficiency 91 % from based metal.
| Item Type: | Conference or Workshop Item (Lecture) |
|---|---|
| Additional Information: | Indexed by Scopus |
| Uncontrolled Keywords: | Friction; Friction stir welding; Joining; Magnesium; Research laboratories; Surface defects; Tensile strength; Tensile testing; Tribology; Welding |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures |
| Faculty/Division: | Faculty of Mechanical Engineering |
| Depositing User: | Mrs. Neng Sury Sulaiman |
| Date Deposited: | 11 Jul 2018 06:12 |
| Last Modified: | 11 Jul 2018 06:12 |
| URI: | http://umpir.ump.edu.my/id/eprint/20934 |
| Download Statistic: | View Download Statistics |
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