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

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

doi:10.18178/ijmerr.8.4.553-558

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

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

Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology, Manipal

Research output: Contribution to journal › Article › peer-review

Abstract

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 language	English
Pages (from-to)	553-558
Number of pages	6
Journal	International Journal of Mechanical Engineering and Robotics Research
Volume	8
Issue number	4
DOIs	https://doi.org/10.18178/ijmerr.8.4.553-558
Publication status	Published - 01-01-2019

All Science Journal Classification (ASJC) codes

Control and Systems Engineering
Mechanical Engineering
Artificial Intelligence

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title = "Mechanical characterization and microstructural analysis of AISI 4340 ferrite-martensite dual phase steel",

abstract = "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.",

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Mechanical characterization and microstructural analysis of AISI 4340 ferrite-martensite dual phase steel. / Gurumurthy, B. M.; Sharma, Sathyashankara; Ramakrishna Vikas, S.; Achutha Kini, U.

In: International Journal of Mechanical Engineering and Robotics Research, Vol. 8, No. 4, 01.01.2019, p. 553-558.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Mechanical characterization and microstructural analysis of AISI 4340 ferrite-martensite dual phase steel

AU - Gurumurthy, B. M.

AU - Sharma, Sathyashankara

AU - Ramakrishna Vikas, S.

AU - Achutha Kini, U.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - 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.

AB - 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.

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

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