Pengaruh Polaritas Arus Listrik Terhadap Sifat Mekanik Sambungan Las Aluminium AA1100 Pada Pengelasan GTAW (Gas Tungsten Arc Welding)

Haidirali, Tawaf and , Muh. Alfatih Hendrawan.,ST.,MT. (2022) Pengaruh Polaritas Arus Listrik Terhadap Sifat Mekanik Sambungan Las Aluminium AA1100 Pada Pengelasan GTAW (Gas Tungsten Arc Welding). Skripsi thesis, Universitas Muhammadiyah Surakarta.

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Abstract

GTAW welding (Gas Tungsten Arc Welding) is one type of electric arc welding with gas shield. This study aims to find out the mechanical properties of Aluminum AA1100 after undergoing the GTAW welding process using current variations of 130 A, 150 A, and 170 A at ac and DCEN polarity. This welding uses AWS A5 tungsten electrodes. 12-98 and welding wire or filler ER4043. The type of splicing used is a butt joint with the type of campuh is single v groove with an angle of 30o. The standard used for the manufacture of tensile test specimens and their testing is ASME IX, for chemical composition testing using the ASTM A751-01 standard. For hardness tests using ASTM E92 standard. The tensile test results in the highest average voltage value found in the ac polarity with a current of 130 A of 107.457 Mpa, and the highest stretch average value is also found in the current AC polarity of 170 A of 7.084%. For the hardness test the weld metal area produces the highest average hardness value found in the DCEN polarity with a current of 170 A of 66.1 VHn, while in the HAZ area the highest hardness value is found in the DCEN polarity with a current of 130 A of 32.5 VHn. And viewed from the micro photo shows a noticeable change in grains, along with the increase in current affects the large change of grains. If the greater the current given, it appears that the area affected by the heat of the FeAl3 grain becomes larger, while in the weld area it will be more dominant FeAlC.

Item Type:	Thesis (Skripsi)
Uncontrolled Keywords:	Pengelasan GTAW, Aluminium, Polaritas
Subjects:	T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures
Divisions:	Fakultas Teknik > Teknik Mesin
Depositing User:	TAWAF HAIDIRALI
Date Deposited:	16 Jun 2022 03:26
Last Modified:	16 Jun 2022 03:26
URI:	http://eprints.ums.ac.id/id/eprint/101019

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