Findings of grain coarsening temperature and grain growth of light weight steel used in automotive industry

Authors

  • Dr. Shahid Hussain Abro NED University of Engineering and Technology Department of Materials Engineering Karachi Pakistan
  • Alidad Chandio
  • Hazim. A. Moria
  • Ambreen Azmat
  • Shafaq Asrar

Abstract

Efforts have been made in this research and experimental work to observe the grain coarsening temperature (GCT) by keeping in view the formation of second phase particles. Four steels having different chemical compositions were heat treated at series of temperatures i-e 850°C, 925°C, 1000°C, 1100°C and 1175°C with holding time of 1 hour and 2 hours respectively. After heat treatment traditional method of grinding and polishing was applied to reveal the microstructure. Grain size distribution at each temperature was calculated by using matrox inspector and the result was plotted with origin data analysis software. It was found that presence of second phase particles can affect the grain growth phenomena in the experimental steels and also grain growth have consequences on grain coarsening temperature on the steel under investigation. Steel A (Nb-Al) showed the finest grain structure, Grain size of steel B (Nb) was slightly higher than that of steel A. In steel C (Al), AlN particles did not exist. The only particles present were of TiN. Hence, the mean grain size of steel C was higher than that of steel A and steel B.

Author Biography

Dr. Shahid Hussain Abro, NED University of Engineering and Technology Department of Materials Engineering Karachi Pakistan

Assistant Professor

NED University of Eng and Technology KarachiDepartment of Materials and Metallurgical Engineering

References

[1] Huisheng Jiao, Fernando Barradas, Tiesheng Rong, Ian P Jones, Mark Aindow. (2005). The microstructural evolution of NbAlV ternary alloys, Intermetallics, 1157-1165.

[2] J. Iqbal, F. Ahmed, F Hasan. (2008) Development of Microstructure in Silicon-Aluminum-Bronze, Pakistan Journal of Engineering & Applied. Science. 47-53.

[3] Shahid Hussain Abro, Alidad Chandio. (2018). Effect of Heating Rate on Microstructural Developments in Cold Heading Quality Steel used for Automotive Applications. Mehran University Research Journal of Engineering & Technology 461-466.

[4] Y. Tan et al., (2003). Effect of alloy composition on microstructure and high temperature properties of Nb-Zr-C ternary alloys. Materials Science and Engineering A, 341 282–288.

[5] J. H Kang,. & S. Torizuka. (2007). Dynamic recrystallization by large strain deformation with a high strain rate in ultralow carbon steel. Scripta Mater. 1048–1051.

[6] Shahid Hussain Abro, et al., (2018) Influence of Austenite phase transformation on existing Microstructure of low carbon-manganese steel. Engineering, Technology & Applied Science Research 3525-3529 2241-4487.

[7] V.K. Sikka and E.A. Loria, (1997), Characteristics of a multicomponent Nb-Ti-Al alloy via industrial-scale practice,” Materials Science and Engineering A, 745– 751.

[8] Xu, D., Zheng, B., Zhu, M. Y. & Zhao, H. Y. (2015). Evolution of Dynamically Recrystallized Grains in Steel SCM435. Metallurgist 677–683.

[9] Shahid Hussain Abro, AD Chandio. (2019). Effect of Al, Ni, Mo, Ti, Nb and temperature on grain size number in low carbon high alloyed steel” Sindh University Research Journal (Sci.Ser.). 45-51.

[10] A.Devaraj et.al., (2019). Grain boundary segregation and intermetallic precipitation in coarsening resistant nanocrystalline aluminum alloys. Acta Materialia. 698-708.

[11] HuanZhao, et.al., (2018). Segregation assisted grain boundary precipitation in a model Al-Zn-Mg-Cu alloy. Acta Materialia. 318-329.

[12] AlexisGraux. et.al., (2019). Precipitation and grain growth modelling in Ti-Nb microalloyed steels. Materialia. 100-233.

[13] T. Gladman, D. Dulieu. (1974). Grain-size control in steels. Metal Sci. 167-176.

[14] P.R. Rios, D. Zllner. (2018). Grain growth unresolved issues Mater. Sci. Technol. 629-63

[15] T. Gladman (2002). The Physical Metallurgy of Microalloyed Steels, Book/The Institute of Materials, Maney, London.

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Published

2019-10-14

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Section

Polymer Engineering and Chemical Engineering, Materials Engineering, Physics, Chemistry, Mathematics