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Triyono .
Staff Jurusan Teknik Mesin, Fakultas Teknik, Universitas Sebelas Maret
Aerospace Engineering Automotive Engineering Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Pengaruh pre-strain dan tegangan listrik terhadap sifat fisik mekanik dan korosi sambungan las titik (RSW) logam beda jenis antara AISI 430 dan JSL AUS (J1) Arief Ari Kuntoro; Triyono .; Heru Sukanto
Jurnal Teknik Mesin Indonesia Vol 12 No 2 (2017): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1009.29 KB) | DOI: 10.36289/jtmi.v12i2.74

Abstract

Distortion often occurs in thin plate welding process. Pre-strain is ussualy choosen for repairing those failure. Pre-strain is the method which stretchs and holds the material before welding process. The main objective of this research is to investigate the effect of pre-strain and voltage on corrosion, physic and mechanics properties of dissimilar metals spot welded between AISI 430 and J1. Variation of pre-strain treatment is (0%; 0.2%; 0.5%; 1%) and voltage is (1.60V; 1.79V; 2.02V; 2.30V). Electrode pressure force is 500N. NaCl 3.5% solution is used for potentiodynamic polarization corrosion test. As a result of the experiment showed that nugget size enlarge with increasing voltage which cause pullout failure mode. Nugget size decrease after pre-strain was applied to the specimen and makes interfacial failure mode. Variation of pre-strain at 1% and voltage at 2.30V had the highest corrosion rate of 0.0497 mm/y. Pitting corrosion is the corrosion which occurs in the specimen. Pitting corrosion occurs due to overheating when welding with pre-strain treatment cause the protective oxide passive film layer from AISI 430 was damaged.
Pengaruh plunge depth dan preheat terhadap sifat mekanik sambungan friction stir welding polyamide Budy Nugroho; Triyono .; Nurul Muhayat
Jurnal Teknik Mesin Indonesia Vol 11 No 2 (2016): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (474.987 KB) | DOI: 10.36289/jtmi.v11i2.57

Abstract

Friction stir welding is a joining method that utilizes heat caused by the friction between workpiece material and pin. It employs several parameters such as tool rotational speed, welding speed, and plunge depth. The objective of this research is to investigate the effect of plunge depth and preheat on the mechanical properties of friction stir welding polyamide materials. This research used the plunge depths of 5.6 mm, 5.65 mm, 5.7 mm, and 5.75 mm. The parameters maintained to be constant were tool rotational speed of 620 rpm, welding speed of 7.3 mm/minutes, and tool tilt angle of 20. Preheat of 1700C was done as well non preheat method to compare of both methods.The maximum tensile and bending strength was obtained at the tool plunge depth of 5.7 mm with preheat. The value of maximum tensile and bending is 27,3 Mpa, and 75,7 Mpa. The optimization of tool plunge depth and preheat made the stirring better so that the molten material could spread all over weld region. The spreading of the molten material minimized void or defect in the weld region. As a result, the mechanical characteristic of joint increased.
Co-Authors Arief Ari Kuntoro Budy Nugroho Heru Sukanto Nurul Muhayat