scholarly journals ST41 Tensile Strength Analysis of Spiral Groove Welding with Three Current Variations

2020 ◽  
Vol 8 (2) ◽  
pp. 62
Author(s):  
Mojibur Rohman ◽  
Ahmad Saepuddin ◽  
Mochamad Adhi Fardana
Keyword(s):  
Tensile Strength ◽  
Arc Welding ◽  
Current Strength ◽  
Strength Analysis ◽  
Spiral Groove ◽  
Shielded Metal Arc Welding ◽  
Gas Tungsten Arc ◽  
Metal Arc Welding ◽  
Welding Processes ◽  
Spiral Grooves

Welding is one of the important aspects in the process of joining metal, iron or steel. This study aims to determine the effect of SMAW welding techniques in spiral grooves with variations in currents of 100 Amperes, 110 Amperes and 120 Amperes to the tensile strength of St 41 steel. This research is an experimental study conducted in two places namely BLKI Singosari, Malang and Faculty of Engineering, ITN Malang, East Java. The results showed that the current strength and electrode flow in welding have an influence on the tensile strength even though the results are not significant. Average tensile strength at 100 Amperes current is 46.75 Kgf / mm², at 110 Amperes current is 44.87 Kgf / mm², and at 120 Amperes current is 43.80 Kgf / mm². The results of this test indicate that the variation of the current in SMAW welding with the spiral groove method influences the tensile strength of St 41 steel. Based on the findings in this study it can be concluded that the highest tensile strength value of 46.75 Kgf / mm² occurs in welding spiral grooves with strong currents of 100 Ampere. Keywords : SMAW welding; spiral groove, strong current, tensile strength; ST41.ReferencesAnwar, B. (2017). Analisis kekuatan tarik hasil pengelasan posisi bawah tangan dengan perbedaan variasi kuat arus listrik pada baja st 42. Teknologi, 16 (1), 18-24.Budiman, H. (2016). Analisis pengujian tarik (tensile test) pada baja st37 dengan alat bantu ukur load cell teknik mesin. J-Ensitec, 3(1), 9-13.Daryanto. (2012). Teknik Las. Bandung: AlfabetaGunawan, Y. Endriatno, N. Anggara, B, H. (2017). Analisa pengaruh pengelasan listrik terhadap sifat mekanik baja karbon rendah dan baja karbon tinggi. Enthalpy Jurnal Ilmiah Mahasiswa Teknik Mesin, 2(1), 2502-8944.Imam, P, M. dan Sarjito, J, S. (2012). Analisis kekuatan sambungan las smaw (shielded metal arc welding) pada marine plate st 42 akibat faktor cacat porositas dan incomplete penetration. KAPAL, 5(2), 102-113.Kolo, J.M., Nugraha, I.N.P. & Widayana, G. (2017). Pengaruh variasi arus terhadap kekuatan impact dan kekerasan material st 37 menggunakan proses pengelasn gas tungsten arc welding (GTAW). Jurnal Pendidikan Teknik Mesin Undiksha, 8(2), 1-10.Kurniawan, S, A., Solichin & Puspitasari, P. (2014). Analisis kekuatan tarik dan struktur mikro pada baja st.41 akibat perbedaan ayunan elektroda pengelasan SMAW. Jurnal Teknik Mesin, 22(2), 1-12.Mohruni, A, S. dan Kembaren, B, H. (2013). Pengaruh variasi kecepatan dan kua arus terhadap kekerasan, tegangan tarik, strukturmikro baja karbon rendah dengan elektroda e6013. Jurnal Rekayasa Mesin, 13(1), 1-8.Pranawan, D, F, B. dan Suwito, D. (2016). Pengaruh teknik pengelasan alur spiral, alur zig – zag, dan lurus pada arus 85 a terhadap kekuatan tarik baja st 41. Jurnal Teknik Mesin. 4(2), 29 – 32.Siswanto & Amri, S. (2011). Konsep dasar teknik las. Edisi 1. Jakarta : PT. Prestasi Pustakaraya.Weman, K. (2003). Welding processes handbook. Woodhead Publishing Limited, Cambride.Widharto, S. (1996). Petunjuk kerja las. Jakarta: Pradnya ParamitaWiryosumarto. 2000. Teknologi pengelasan logam. Jakarta: PT. Pradnya Paramita.

A study on sustainability assessment of welding processes

2019 ◽  
Vol 234 (3) ◽  
pp. 501-512 ◽  
Author(s):  
Jaber Jamal ◽  
Basil Darras ◽  
Hossam Kishawy
Keyword(s):  
Arc Welding ◽  
Social Impact ◽  
Sustainability Assessment ◽  
Gas Metal Arc Welding ◽  
Welding Process ◽  
Friction Stir ◽  
Gas Tungsten Arc ◽  
Metal Arc Welding ◽  
Sustainability Assessments ◽  
Welding Processes

The concept of “sustainability” has recently risen to take the old concept of going “green” further. This article presents general methodologies for sustainability assessments. These were then adapted to measure and assess the sustainability of welding processes through building a complete framework, to determine the best welding process for a particular application. To apply this methodology, data about the welding processes would be collected and segregated into four categories: environmental impact, economic impact, social impact, and physical performance. The performance of each category would then be aggregated into a single sustainability score. To demonstrate the capability of this methodology, case studies of three different welding processes were performed. Friction stir welding obtained the highest overall sustainability score compared to gas tungsten arc welding and gas metal arc welding.

Effect of Post-Weld Heat Treatment on Hardness in Superduplex Stainless Steel ASTM A890/A890M - Grade 6A

2020 ◽  
Vol 1012 ◽  
pp. 296-301
Author(s):  
Clélia Ribeiro de Oliveira ◽  
Eloá Lopes Maia ◽  
Solange T. da Fonseca ◽  
Marcelo Martins ◽  
Julián Arnaldo Ávila Díaz ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Arc Welding ◽  
Treatment Condition ◽  
Heat Treatment Condition ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding ◽  
Superduplex Stainless Steel ◽  
Secondary Austenite ◽  
Welding Processes

Superduplex stainless steel alloy exhibit high mechanical and corrosion resistance, which main industrial application is in the petrochemical industry. The manufacture and maintenance of such equipment usually involve welding processes, followed by post-welded heat treatment and it often becomes impossible to apply heat treatments. Thereby, the purpose of this work is to verify the effect of a post-welded heat treatment on shielded metal arc welding in steel grade ASTM A890/A890M - grade 6A. The microstructure in the as-welded condition consisted of austenite, secondary austenite, and ferrite phases and, the post-welded heat treatment condition exhibited only austenite and ferrite. The hardness in the melt zone reached values of 300 HV after welding and, the value was reduced to 260 HV in the post-welded heat treatment condition.

Optimization of Tensile Strength in Automated Shielded Metal Arc Welding Using Taguchi Technique

2021 ◽  
pp. 364-369
Author(s):  
Shamini Janasekaran ◽  
Walisijiang Tayier ◽  
Gan Jin Hoe ◽  
Teo Hiu Hong
Keyword(s):  
Tensile Strength ◽  
Arc Welding ◽  
Taguchi Technique ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding

scholarly journals Caracterização microestrutural de soldas dissimilares dos aços ASTM A-508 e AISI 316L

2010 ◽  
Vol 15 (2) ◽  
pp. 112-120 ◽  
Author(s):  
Luciana Iglésias Lourenço Lima ◽  
Guilherme Marconi Silva ◽  
Angel Raphael Arce Chilque ◽  
Mônica Maria de Abreu Mendonça Schvartzman ◽  
Alexandre Queiroz Bracarense ◽  
...  
Keyword(s):  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Aisi 316L ◽  
Shielded Metal Arc Welding ◽  
Dissimilar Metal ◽  
Gas Tungsten Arc ◽  
Metal Arc Welding ◽  
Gas Tungsten

As soldas dissimilares (dissimilar metal welds - DMWs) são utilizadas em diversos segmentos da indústria. No caso específico de usinas nucleares, tais soldas são necessárias para conectar tubulações de aço inoxidável com componentes fabricados em aços baixa liga. Os materiais de adição mais utilizados neste tipo de solda são as ligas de níquel 82 e 182. Este trabalho consistiu na soldagem de uma junta dissimilar de aço baixa liga ASTM A-508 G3 e aço inoxidável austenítico AISI 316L utilizando as ligas de níquel 82 e 182 como metais de adição. A soldagem foi realizada manualmente empregando os processos de soldagem ao arco SMAW (Shielded Metal Arc Welding) e GTAW (Gas Tungsten Arc Welding). Os corpos de prova foram caracterizados microestruturalmente utilizando-se microscópio óptico e microscópio eletrônico de varredura com microanálise por dispersão de energia de raios X (EDS) e ensaios de microdureza Vickers. Observou-se uma microestrutura constituída de dendritas de austenita com a presença de precipitados com formas e dimensões definidas pelo aporte térmico e pela direção de soldagem. Não houve variação significativa da dureza ao longo da junta soldada, demonstrando a adequação dos parâmetros de soldagem utilizados.

scholarly journals Estudo das tensões residuais de juntas soldadas de aço API 5L X80

2013 ◽  
Vol 18 (3) ◽  
pp. 217-226 ◽  
Author(s):  
Bruno Allison Araújo ◽  
Maria do Socorro Silva Sousa Lima ◽  
Theophilo Moura Maciel ◽  
Antonio Almeida Silva ◽  
Emanuel Pereira Soares
Keyword(s):  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Shielded Metal Arc Welding ◽  
Gas Tungsten Arc ◽  
Metal Arc Welding ◽  
Gas Tungsten

Este trabalho teve por objetivo determinar os níveis de tensões residuais decorrentes de processos de soldagem em juntas soldadas de um aço API 5L X80. Inicialmente foram executados os procedimentos de soldagem das juntas utilizando os processos de soldagem eletrodo revestido - Shielded Metal Arc Welding (SMAW) e eletrodo de tungstênio com proteção gasosa - Gas Tungsten Arc Welding (GTAW), variando-se os consumíveis utilizados e empregando-se uma temperatura de interpasse de 175ºC, obtendo-se, desta maneira, três juntas soldadas. Foram avaliadas as regiões superiores e inferiores das juntas, determinando-se os níveis de tensões residuais transversais e longitudinais. As medidas de tensão residual foram realizadas por difratometria de raios-x através de um difratômetro portátil e respectivo software para análise dos resultados. Para a região superior das juntas soldadas, foi observado que quanto mais elevado for o aporte térmico mais compressivas foram os níveis de tensões residuais transversais, e mais deslocadas ficaram os picos de tensões trativas. Na região inferior das juntas soldadas, foi verificado que para maiores aportes térmicos, maiores foram os níveis de tensões residuais trativas na região do Metal de Solda (MS) e menor foi o nível de tensões residuais trativas na Zona Termicamente Afetada (ZTA).

Fatigue and Fracture Toughness Properties of 9 Percent Nickel Steel at LNG Temperatures

1973 ◽  
Vol 95 (4) ◽  
pp. 1069-1075 ◽  
Author(s):  
D. A. Sarno ◽  
D. E. McCabe ◽  
T. G. Heberling
Keyword(s):  
Fracture Toughness ◽  
Arc Welding ◽  
Base Plate ◽  
Nickel Steel ◽  
Rotating Beam ◽  
Shielded Metal Arc Welding ◽  
Percent Nickel ◽  
Metal Arc Welding ◽  
Fatigue And Fracture ◽  
Welding Processes

9 percent nickel steel has been evaluated for use in a semimembrane LNG containment design. Fatigue and fracture toughness properties of 1/4 in. thick base plate and weldments have been determined at cryogenic temperatures. Results of rotating beam fatigue, stress intensity (Kc) and fatigue crack growth rate (da/dN versus ΔK) studies are presented. Data predict that 9 percent nickel steel, fabricated with the gas metal arc and shielded metal arc welding processes, may be successfully applied as the primary tank material for this LNG design.

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