Microstructural characteristic of the 24Cr2SiMn super ferritic stainless steel synthesized using local Indonesian materials

Authors

  • Mohammad Dani Center for Science and Technology of Advanced Materials – BATAN, Kawasan Puspiptek Serpong, Tangerang 151314, Indonesia
  • Arbi Dimyati Center for Science and Technology of Advanced Materials – BATAN, Kawasan Puspiptek Serpong, Tangerang 151314, Indonesia
  • Parikin Parikin Center for Science and Technology of Advanced Materials – BATAN, Kawasan Puspiptek Serpong, Tangerang 151314, Indonesia
  • Fadli Rohman Center Facility for Electron Microscopy, RWTH Aachen University, 52074, Ahornstrasse 55, Aachen, Germany
  • Riza Iskandar Central Facility for Electron Microscopy (GFE), RWTH-Aachen, Ahornstrasse 55, D-52074 – Aachen, Germany
  • Aziz Khan Jahja Center for Science and Technology of Advanced Materials – BATAN, Kawasan Puspiptek Serpong, Tangerang 151314, Indonesia
  • Andon Insani Center for Science and Technology of Advanced Materials – BATAN, Kawasan Puspiptek Serpong, Tangerang 151314, Indonesia
  • Syahbuddin Syahbuddin Pancasila University, Department of Mechanical Engineering, Faculty of Technik, Srengseng Sawah, Jagakarsa,Jakarta 12640 Indonesia
  • Ching An Huang Department of Mechanical Engineering, Chang Gung University, Taoyuan, Taiwan

DOI:

https://doi.org/10.11113/mjfas.v15n6.1519

Keywords:

Super ferritic stainless steel, precipitates, XRD, HRPD, SEM, TEM

Abstract

Precipitation is a key factor for the mechanical properties of material at high temperature application. It is important to study the formation and stability of precipitates in order to optimize the material properties. In this article, the author presents the preliminary results of the microstructure including precipitates formation in Fe-24Cr-2Si-0.8Mn (wt%) super ferritic stainless steel. Both the X-ray and the HRPD neutron diffraction pattern characterizations showed the first four characteristic reflections intensity with Miller indices corresponding to the (110), (200), (211), (220) diffraction planes that are typical for diffracting plan (hkl) of bcc system. The Scanning Transmission Electron Microscopy (STEM)-High Angle Angular Dark Field (HAADF) images and semi-quantitative Energy-Dispersive X-ray Spectroscopy (EDS) revealed the presence of chromium-carbide and chromium rich precipitates in rod-like shape with the size of about 700 nm in length and 250 nm in width. EDX semi-quantification results showed that the precipitate in the ferritic sample typically consists of 55.04 wt%C, 0.78 wt%Si, 35.42 wt%Cr, 0.68 wt%Mn, and 8.37 wt%Fe. Moreover, Selected Area Electron Diffraction (SAED) analysis revealed (Fe,Cr)7C3 as one of the chromium-carbide formed as precipitates. Finally, HRTEM images showed atomic structure of matrix and precipitates at dendrite boundaries at atomic level.

Author Biography

Mohammad Dani, Center for Science and Technology of Advanced Materials – BATAN, Kawasan Puspiptek Serpong, Tangerang 151314, Indonesia

Sarjana - Physics University of Indonesia, INDONESIA

Dip. -Ing.  RWTH-Aachen Germany

Dr. rer.nat. RWTH-Aachen Germany 

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Published

04-12-2019

Issue

Vol. 15 No. 6 (2019): November - December

Section

Article