Mechanical characterization and microstructural analysis of AISI 4340 ferrite-martensite dual phase steel

B. M. Gurumurthy, Sathyashankara Sharma, S. Ramakrishna Vikas, U. Achutha Kini

Research output: Contribution to journalArticle


Present investigation deals with the mechanical properties and microstructure of dual phase (DP) steel. Normalizing and intercritical annealing heat treatments were carried out at 900, 750, 770, and 790 °C and DP ferrite-martensite steel was obtained. Interaction behavior of both phases has been analyzed through tensile, hardness and impact strength. Comparison of the DP steel with normalized steel has revealed that hardness and tensile strength increases as intercritical temperature increases. Similarly ductility and toughness decreases as the intercritical temperature increases and normalized steel shows better elongation and toughness. The microstructure analysis shows, as the intercritical temperature increases, martensite quantity increases with decrease in ferrite content, which results in improvement in the tensile strength and hardness. The results have shown a decrease in the ductility and toughness as the volume of martensite increases.

Original languageEnglish
Pages (from-to)553-558
Number of pages6
JournalInternational Journal of Mechanical Engineering and Robotics Research
Issue number4
Publication statusPublished - 01-01-2019


All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Mechanical Engineering
  • Artificial Intelligence

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