Metallurgical investigation of direct drive friction welded joint for austenitic stainless steel (AISI 316)

Authors

  • Ammar JABBAR HASSAN a:1:{s:5:"en_US";s:154:"Laboratoire de Mécanique Avancée “LMA”, Université des Sciences et de la Technologie Houari Boumediene. BP. 32, El-Alia, 16111 Bab-Ezzoaur, Algiers";} https://orcid.org/0000-0003-3031-9074
  • Billel Cheniti Research Center in Industrial Technologies, P.O. Box 64, Chéraga, 16014 Algiers,
  • Brahim Belkessa Research Center in Industrial Technologies, P.O. Box 64, Chéraga, 16014 Algiers,
  • Taoufik Boukharouba Advanced Mechanics Laboratory, Houari Boumediene University of Sciences and Technology, BP. 32, El-Alia, 16111 Bab-Ezzouar, Algiers,
  • Djamel Miroud Science and Engineering Materials Laboratory (LSGM) USTHB BP 32 El Alia 16111, Bab Ezzouar, Algiers,
  • Nacer-Eddine Titouche Birine Nuclear Research Center, BP. 180, Ain Oussera, Djelfa, 17200,

DOI:

https://doi.org/10.36547/ams.29.2.1802

Keywords:

Austenitic stainless steel, Friction welding, highly plastically deformed zone, Thermo-mechanically affected zone, AISI 316

Abstract

The present study investigates the metallurgical behavior of direct-drive friction-welded (DDFW) joints for high Cr, Ni, and Mo steel (AISI 316). Macro-microscopic, microhardness, and X-ray diffraction (XRD) were conducted. The results for the macroscopic view showed that the narrow welding center did not exceed 600 µm and there were no macro cracks or defects, indicating a uniform structure. The microstructure exhibited a significant welded joint interface with microcavities and a grain refinement of 10 µm, about three times smaller than the grain size of AISI 316, due to the creation of a highly plastically deformed zone (HPDZ), while the thermo-mechanically affected zone (TMAZ) formed in the neighboring area with a grain growth of about 100 µm, relatively enlarged three times compared to AISI 316 and time time related HPDZ. Thus, the high level of microhardness was investigated at the welding center and low values in the neighboring area were caused by the formation of the HPDZ and TMAZ, respectively. XRD also illustrated the concentration of gamma iron at the 111 level due to the grain refinement resulting from high plastic deformation.

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Published

2023-06-20

How to Cite

JABBAR HASSAN, A., Cheniti, B., Belkessa, B., Boukharouba, T., Miroud, D., & Titouche, N.-E. (2023). Metallurgical investigation of direct drive friction welded joint for austenitic stainless steel (AISI 316). Acta Metallurgica Slovaca, 29(2), 88–92. https://doi.org/10.36547/ams.29.2.1802

Issue

Vol. 29 No. 2 (2023): Acta Metallurgica Slovaca

Section

Research papers