Determination of Tungsten Inert Gas Welding Input Parameters to Attain Maximum Tensile Strength of 316L Austenitic Stainless Steel

Abstract

Weld quality mainly depends on the weld bead geometry and mechanical-metallurgical characteristics of the welded joint which has a direct relationship with the type of welding process being used and its input process parameters i.e. welding current, arc voltage, travel speed etc. In the present study, determination of tungsten inert gas (TIG) welding input parameters for achieving maximum tensile strength of 316L austenitic stainless steel is investigated. Box-Behnken design of response surface methodology has been employed to formulate the experimental plan to identify the effect of process parameters on tensile strength. Square butt joint configuration has been made using three factors - three levels of welding input parameters. Joint strength has been evaluated by notch tensile strength (NTS) and Unnotch tensile strength (UTS) method and correlated with microstructure and micro hardness of the weld. The results indicate that gas flow rate has greater influence on both NTS and UTS followed by welding current.

Minimizing Losses During Natural Gas Transportation

“…Such data will minimize losses in gas transportation by taking into account the corrosion factor when choosing new transportation routes and improving corrosion protection of existing pipelines. in the future it is necessary to investigate corrosion in the zone of welded joints, which is especially dangerous due to the concentration of residual stresses in the zone of thermal impact [25][26][27].…”

Pengembangan Ketrampilan Pengelasan Pada Kelompok Usaha Bengkel Las

“…Setelah pelatihan dilakukan monitoring secara berkala setiap minggunya untuk memantau perkembangan keterampilan welder dalam penggunaan alat las TIG. Alat ini las TIG ini memiliki beberapa keunggulan dibandingkan las asetilin diantaranya : aliran gas argon pada pengelasan TIG menjadikan hasil las tidak teroksidasi oleh udara dari luar, hasil las lebih kuat karena penetrasi las yang dalam dan ketahanan korosi lebih tinggi, hasil pengelasan lebih bersih, pusat panas sangat kecil sehingga menimalisir terjadinya deformasi (Moi et al, 2018).Perbandingan hasil pengelasan antara las asetilin dan las TIG dari pelatihan yang diberikan ditunjukkan pada Gambar 6, terlihat hasil pengelasan menggunakan las TIG hasil pengelasaanya lebih rapi dan bersih, selain itu heat affected zone yang ditimbulkan lebih kecil karena panas yang terpusat pada lasan, hal tersebut meningkatkan kekuatan las. Hasil akhir dari pelatihan las asetilin dan las TIG yang telah dilakukan pada mitra kelompok usaha Anugerah Las antara lain :…”

Parametric Study for Wire Cut Electrical Discharge Machining of Sintered Titanium

“…The observation received in the present research paper that the MRR decreases with increase in the percentage weight fraction of SiC and Al2O3 particles in the MMCs and HMMCs, whereas, the surface roughness parameter increases with increase in the percentage weight fraction of SiC and Al2O3 particles due to the hardness of MMCs and HMMCs composites. Moi Subhas Chandra et al [27] in their research paper explain about the Box-Behnken design of response surface methodology and the process of their employment to formulate the experimental plan to identify the effect of process parameters. Srinivasa Rao Mallipudi et al [28] employed in their research work Response surface methodology (RSM) to construct a mathematical regression model.…”