Putri, Chynta Maharani (2025) Analisis Pengaruh Variasi Arus dan Ketebalan Pelat terhadap Kekerasan dan Morfologi Struktur Mikro Sambungan Pengelasan SMAW Baja ASTM-A36. Undergraduate thesis, UPN Veteran Jawa Timur.
![[img]](https://repository.upnjatim.ac.id/style/images/fileicons/text.png) |
Text (Cover)
21036010051_Cover.pdf Download (699kB) |
|
Text (Bab 1)
21036010051_Bab 1.pdf Download (229kB) |
|
Text (Bab 2)
21036010051_Bab 2.pdf Restricted to Repository staff only until 16 September 2027. Download (894kB) |
|
Text (Bab 3)
21036010051_Bab 3.pdf Restricted to Repository staff only until 16 September 2027. Download (516kB) |
|
Text (Bab 4)
21036010051_Bab 4.pdf Restricted to Repository staff only until 16 September 2027. Download (1MB) |
|
Text (Bab 5)
21036010051_Bab 5.pdf Restricted to Repository staff only until 16 September 2027. Download (220kB) |
|
Text (Daftar pustaka)
21036010051_Daftar Pustaka.pdf Download (196kB) |
|
Text (Lampiran)
21036010051_Lampiran.pdf Restricted to Repository staff only Download (1MB) |
Abstract
Welding is a method used to join metals commonly employed in steel construction, including low carbon steel ASTM A36. In the maintenance and repair industries for heavy equipment such as Grab Ship Unloaders (GSU) and excavator arms, mechanical Testing on welded joints is often not applied, thus the quality of the joints is not entirely guaranteed. This study aims to analyze the influence of variations in current, plate thickness, and the welding zone on the hardness value of ASTM A36 steel welded joints. The welding process was conducted using the Shielded Metal Arc Welding (SMAW) method with current variations of 70 A, 90 A, and 110 A, as well as steel plate thicknesses of 8 mm, 10 mm, and 12 mm. Brinell hardness tests were performed on three main zones: Base Metal, Heat Affected Zone (HAZ), and Weld Metal. The research results indicate that variations in current, plate thickness, and zones significantly influence hardness values, with a p-value (p<0.05) from the Three-Way ANOVA test yielding a significance result of 0.015. Among these three variables, the welding zone has the most dominant effect on hardness values. The optimal condition is achieved at a current of 90 A with a plate thickness of 10 mm, as this results in hardness values among the zones approaching a ratio of 1:1:1. This condition is important because excessive contrast in hardness between zones can lead to localized stress at the joints under load. Additionally, an increase in current also produces more metal spatter, which affects surface quality and the regularity of the weld bead pattern. Keywords: SMAW, Hardness test, Microstructure
| Item Type: | Thesis (Undergraduate) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Contributors: |
|
||||||||
| Subjects: | T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery T Technology > TS Manufactures > TS 180-TS180.8 Material Handling |
||||||||
| Divisions: | Faculty of Engineering > Departement of Mechanical Engineering | ||||||||
| Depositing User: | Chynta Putri | ||||||||
| Date Deposited: | 17 Sep 2025 05:05 | ||||||||
| Last Modified: | 17 Sep 2025 05:05 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/43753 |
Actions (login required)
 |
View Item |