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All Journal Majalah Ilmiah Pengkajian Industri Metalurgi Makara Journal of Technology
Parikin Parikin
Center of Science and Technology for Advanced Materials, National Atomic Energy Agency/BATAN, Puspiptek Serpong, Banten 15314, Indonesia
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Effects of Plasma Sintering on the Post TIG Weld Joint of Fe-15Cr-25Ni Austenitic Stainless Steel Parikin, Parikin; Dani, Mohammad; Dimyati, Arbi; Insani, Andon; Deswita, Deswita; Aziz, Ferhat; Mardiyanto, Mardiyanto; Mustofa, Salim; Purwanto, Setyo; Adhika, Damar Rastri; Syahbuddin, Syahbuddin; Huang, Ching An
Makara Journal of Technology Vol. 26, No. 1
Publisher : UI Scholars Hub

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Abstract

Arc-plasma sintering (APS) for 5 s has been applied to the post tungsten inert gas (TIG) weld joint of Fe–15Cr–25Ni austenitic stainless steel (ASS). The treatment is intended to observe the effect of heat generated by plasma on micro-crystal structures around the fusion zone (FZ), especially internal stress relief in steel after being subjected to welding. The effect of stress relief in weld was measured using the neutron diffraction technique. ASS that is predominantly composed of Fe, Cr, and Ni elements, with contents of 57%, 15%, and 25%wt. respectively, was cut into two parts. Both parts were then welded with TIG without filler with a current and voltage of 60 A and 50 V, respectively. After APS for 5 s, the sample was characterized and analyzed using high-resolution powder neutron diffractometer at a high-temperature laboratory facility. The results show that the tensile residual stress decreased with the APS heat input. The residual stresses significantly decreased from 82.40 MPa to 1.21 MPa in the FZ and continued almost evenly from 65.92 MPa to 1.24 MPa in the heat-affected zone (HAZ). The residual stress is a tensile stress that can reduce the mechanical strength of materials. This condition is also applicable to applied loads. A microstructure gives a confirmation that the C element migrates from the FZ to HAZ. The content was very high in dark traces. The C element reacts to Cr and O to form chromium carbide (Cr23C6) and chromium carbonyl (CrC6O6), respectively. It rapidly migrates among its grain boundaries. It may also weaken materials and probably initiate intergranular cracks.
Co-Authors A. Dimyati, A. A. Insani A.H. Ismoyo Abu Khalid Rivai Agus Hadi Ismoyo Andon Insani Arbi Dimyati Bandriyana Bandriyana Damar Rastri Adhika David Allen, David Deswita Deswita Ferhat Aziz Huang, A. Huang, Ching An Jahja, Aziz Khan Joachim Mayer, Joachim M. Dani Mardiyanto Mardiyanto Meijuan Li, Meijuan Mohammad Dani Mustofa, S. Panitra, M. Priyanto, T. H. Pudji Untoro Purnamasari, N. D. Putra, Teguh Yulius Surya Panca Riza Iskandar Salim Mustofa Setyo Purwanto Sugeng, B. Suminta, S Syahbuddin Syahbuddin Teguh Yulius Surya Panca Putra, Teguh Yulius Surya Tri Hardi Priyanto