Manufacturing Technology 2019, 19(2):243-247 | DOI: 10.21062/ujep/277.2019/a/1213-2489/MT/19/2/243

Microstructure Analysis and Mechanical Properties of Low Alloyed Steel with Retained Austenite Obtained by Heat Treatment

Ludmila Kučerová, Andrea Jandová, Kateřina Rubešová
Regional Technological Institute, University of West Bohemia in Pilsen, Univerzitní 8, 30614 Plzeň. Czech Republic

Four different heating temperatures in the range of 770 °C - 950 °C were used for laboratory heat treatment of low carbon low alloyed steel. Chemical composition of the steel was based on the most common TRIP steel concept, only the silicon content was lowered to 0.6% and it was partially replaced by 1.4 % of aluminium. The steel was further micro-alloyed by niobium. Two different ways of cooling were applied to the samples. The first set was cooled to 425 °C in a salt bath with the temperature of 200 °C, the second set was cooled to 425 °C in a salt bath heated to the temperature of 400 °C. In this way, two distinctive cooling rates were achieved for every soaking temperature. Once the samples reached 4250 °C, they were in all cases removed to the furnace for 20 minute hold at the temperature of 425 °C. The final cooling was carried out in air. Resulting microstructures were analysed by scanning electron microscopy and consisted of various amounts of ferrite, bainite and retained austenite. Tensile strength in the range of 750 - 908 MPa was obtained with total elongation of 33-42%.

Keywords: TRIP steel, Aluminium, Heat treatment, Retained austenite
Grants and funding:

Project LO1502 ‘Development of the Regional Technological Institute‘ under the auspices of the National Sustainability Programme I of the Ministry of Education, Youth and Sports of the Czech Republic.

Published: April 1, 2019  Show citation

ACS AIP APA ASA Harvard Chicago IEEE ISO690 MLA NLM Turabian Vancouver
Kučerová L, Jandová A, Rubešová K. Microstructure Analysis and Mechanical Properties of Low Alloyed Steel with Retained Austenite Obtained by Heat Treatment. Manufacturing Technology. 2019;19(2):243-247. doi: 10.21062/ujep/277.2019/a/1213-2489/MT/19/2/243.
Share...
Download citation
  • BibTeX (.bib)
  • Bookends (.ris)
  • EasyBib (.ris)
  • EndNote (.enw)
  • EndNote 8 (.xml)
  • ISI WoS (.isi)
  • Medlars (.medlars)
  • Mendeley (.ris)
  • MODS (.xml)
  • Papers (.ris)
  • RefWorks (.txt)
  • RefManager (.ris)
  • RIS (.ris)
  • MS Word (.xml)
  • Zotero (.ris)
    • Open full article

    References

    1. TALAPATRA, A., BANDHYOPADHYAY, N. R., DATTA, J. (2013). Correlation between Heat Treatment, Microstructure and Properties of Trip-Assisted Steels. In: World Academy of Science, Engineering and Technology, International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering, Vol. 7, No. 4, pp. 80-85.
    2. NEMECEK, S., NOVY, Z., STANKOVA, H. (2006). Optimization of heat treatment of TRIP steels. In: La metallurgia italiana, pp. 47-51.
    3. KUČEROVÁ, L., OPATOVÁ, K., KÁŇA, J., JIRKOVÁ, H. (2017). High Versatility of Niobium Alloyed AHSS, In: Arch. Metall. Mater., Vol. 62, No. 3, pp. 1485-1491. Go to original source...
    4. KUČEROVÁ, L., BYSTRIANSKÝ, M., JENÍČEK, Š., FRANCISCO, P. (2017). Effect of Deformation Conditions on Microstructure and Mechanical Properties of Low Alloyed Steel. In: Manufacturing Technology, Vol. 17, No 5, pp. 752-756. Go to original source...
    5. LI, S., ZHU, R., KARAMAN, I., ARRO'YAVE, R. (2012). Thermodynamic analysis of two-stage heat treatment in TRIP steels. In: Acta Materialia, Vol. 60, pp. 6120-6130. Elsevier Ltd. Go to original source...
    6. NEMECEK, S., NOVÝ, Z. (2006). Microstructure in TRIP steels after intercritical heat treatment, In: Proceedings of The 3rd International Conference on Advanced Structural Steels Gyeongju, Korea, August 22-24.
    7. DING, W., HEDSTORM, P., LI, Y. (2016). Heat treatment, microstructure and mechanical properties of a C-Mn-Al-P hot dip galvanizing TRIP steel. In: Materials Science & Engineering,Vol. A 674, pp. 151-157. Elsevier Ltd. Go to original source...
    8. KUČEROVÁ, L., JIRKOVÁ, H., VOLKMANNOVÁ, J., VRTÁČEK, J. (2018). Effect of Aluminium and Manganese Contents on the Microstructure Development of Forged and Annealed TRIP Steel. In: Manufacturing Technology, Vol. 18, No. 4, pp. 605-610. Go to original source...
    9. SUH, D.W., PARK, S.J, OH, Ch.S., KI, S.J. (2007). Influence of partial replacement of Si by Al on the change of phase fraction during heat treatment of TRIP steels, In: Scripta Materialia, Vol. 5, pp. 1097-1100. Elsevier Ltd. Go to original source...
    10. Xie, P. et al. (2017). A high-performance TRIP steel enhanced by ultrafine grains and hardening precipitates. In: Materials & Design, Vol. 127, pp. 1-7. Go to original source...
    11. ZHANG, Z.G., GICHIMANABE, K. (2014). Influence of Heat Treatment on Hydro formability of TRIP Seamless Steel Tube, In: JOURNAL OF IRON AND STEEL RESEARCH, INTERNATIONAL, Vol. 21. No. 7, pp. 695-701. Elsevier Ltd Go to original source...
    12. WANG, H.S. et al. (2017). Microstructure and mechanical properties of hot-rolled and heat-treated TRIP steel with direct quenching process, In: Materials Science and Engineering A,Vol. 702, pp. 350-359. Go to original source...
    13. KUČEROVÁ, L., JIRKOVÁ, H., MAŠEK, B. (2016). Influence of Nb Micro-alloying on TRIP Steels Treated by Continuous Cooling Process. In: Manufacturing Technology, Vol. 16, No. 1, pp. 145-149. Go to original source...
    14. JENÍČEK, Š., VOREL, I., KÁŇA, J. (2018). Metallographic Observation for Evaluating Microstructural Evolution on Various Cross-Sections of Forged Part upon Air Cooling from Finishing Temperature. In: Manufacturing Technology, Vol. 18, No. 1, pp. 53-56. Go to original source...
    15. PRŮŠA, F., BERNATIKOVÁ, A., PALA, J. (2017) Ultra-High Strength Ti Grade 4 Prepared by Intensive Plastic Deformation In: Manufacturing Technology, Vol. 17, No. 5. pp. 819-822. Go to original source...
    16. KUČEROVÁ, L., JIRKOVÁ, H., MAŠEK, B. (2014). The Effect of Alloying on Mechanical Properties of Advanced High Strength Steels. In: Archives of Metallurgy and Materials, Vol. 59, No.3, pp. 1189-1192. Go to original source...
    17. CHIANG, J., BOYD, J.D., PILKEY, A.K. (2015). Effect of microstructure on retained austenite stability and tensile behaviour in an aluminium-alloyed TRIP steel, In: Material Science and Eng. A, Vol: 638, pp. 132-142. Go to original source...

    This is an open access article distributed under the terms of the Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0), which permits non-comercial use, distribution, and reproduction in any medium, provided the original publication is properly cited. No use, distribution or reproduction is permitted which does not comply with these terms.


    Return to the content