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All Journal Mekanika: Majalah Ilmiah Mekanika
Nurul Muhayat
Staff Pengajar, Program Studi Teknik Mesin, Universitas Sebelas Maret

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Pengaruh Solution Heat Treatment terhadap Sifat Fisis dan Mekanik Proses Pengelasan Fssw AA6063-T5 Ciptadi Natawiguna; Nurul Muhayat; Teguh Triyono
Mekanika: Majalah Ilmiah Mekanika Vol 17, No 1 (2018): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v17i1.35044

Abstract

Friction stir spot welding (FSSW) of aluminum alloy AA6063-T5 will decrease the strength and hardness. Physical and mechanical properties of aluminum alloy can be improved by heat treatment. Heat treatment is affected by temperature and holding time. The heat treatment process used for this research was solution heat treatment with temperature variation 470, 500, 530 oC and holding time 1 and 2 hours. The tests included microstructure test, tensile shear test and vickers hardness test. Result of the research, it was found that Mg2Si particles were precipitated from the grain boundaries part into the aluminum matrix with the coarser size and the distance was increasing as the temperature and the holding time increases. The highest shear tensile strength of 3735,2 N was obtained from the temperature variation of 470 oC and the holding time of 1 hour. The lowest tensile shear strength of 3172,6 N was obtained from temperature variation of 530 oC and 2 hours of holding time. The highest hardness value was obtained of 470 oC variation and 1 hour was 43,7 HVN and the lowest hardness value at 530 oC variation and 2 hours of holding time was 30,1 HVN.
Pengaruh variasi kecepatan putar dan diameter tool terhadap sifat mekanik sambungan fssw aluminium alloy 5052 dan baja ss400 Wahid Ramadhan; Nurul Muhayat; T Triyono
Mekanika: Majalah Ilmiah Mekanika Vol 17, No 1 (2018): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v17i1.35046

Abstract

Friction stir spot welding (FSSW) is a development from solid state welding to jointa different materials (dissimilar). Dissimilar FSSW is widely used in the automotive industry due to the advantages of joining these two materials with weight savings while exploiting the best strength. This research aims to know the effect of welding parameters of rotation speed and tool diameter on mechanical properties on dissimilar FSSW aluminum alloy 5052 and SS400 steel. Variations in rotational speed used is 800, 1250, 1600, 2000 rpm and tool diameter 10, 12, 14 mm. Plunge depth and dwell time in this research were made uniform. This research used a lap joint configuration with aluminum plate placed on the top and steel plate placed on the bottom. Physical characteristics were analyzed through observation of macro and microstructures, while mechanical characteristics through vickers hardness testing and shear tensile testing. The results indicate that the diameter of 10 mm tool and 1600 rpm rotation speed produce the highest tensile shear load value of 2.4 kN with interface fracture.
Co-Authors Ciptadi Natawiguna T Triyono Teguh Triyono Wahid Ramadhan