Microstructure and mechanical properties of AISI 304/DUROSTAT 500 steel double-sided TIG welds

TEKER T., Gunes A.

MATERIALS TESTING, cilt.64, sa.8, ss.1162-1171, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 64 Sayı: 8
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1515/mt-2022-0033
  • Dergi Adı: MATERIALS TESTING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1162-1171
  • Anahtar Kelimeler: AISI 304, DSAW, DUROSTAT 500, mechanical properties, microstructure, RESIDUAL-STRESSES
  • Sivas Cumhuriyet Üniversitesi Adresli: Evet

Özet

In this study, AISI 304 stainless steel and DUROSTAT 500 steel are combined using TIG double-sided arc welding. Microstructural differences of welded joints were researched by using a scanning electron microscope (SEM), an optical microscope, and electron backscattered diffraction. Mechanical properties of welded joints were investigated by microhardness, notch impact, and tensile tests. In addition, fracture surface morphology was evaluated using a SEM. The current power had a major impress on bead and hourglass shape. Maximum tensile resistance (677 MPa) was achieved at a welding time of 0.21 (m center dot min(-1)) at 460 (A) current, and the impact energy (116 J) was obtained. The weld metal consisted 41 wt% cementite, 25 wt% chromium carbide, 20 wt% martensite, and 14 wt% tetrataenite phases. With the increase in the current voltage, both bead and penetration sizes increased.