Effect of Severe Plastic Deformation by High Pressure Torsion on the Microstructure, Mechanical Properties and Pseudoelastic Behavior of the Fe-10Ni-7Mn (wt. %) Steel after Intercritical Annealing treatment

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Javadzadeh Kalahroudi Faezeh; Koohdar Hamidreza; Shirazi Hasan; Jafarian Hamidreza; NILI AHMADABADI MAHMOUD

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Journal: METALLURGICAL ENGINEERING Year:2018 | Volume:21 | Issue:3 (71) Page(s): 176-186

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Title

Effect of Severe Plastic Deformation by High Pressure Torsion on the Microstructure, Mechanical Properties and Pseudoelastic Behavior of the Fe-10Ni-7Mn (wt. %) Steel after Intercritical Annealing treatment

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Keywords

Fe-10Ni-7Mn (wt.%) Low carbon martensitic steelQ1

High pressure torsionQ1

Intercritical annealing in the dual-phase regionQ1

Mechanical propertiesQ2

Psuedoelastic behaviorQ1

Abstract

In this research, the effect of severe plastic deformation by High pressure torsion process on the microstructure, Mechanical properties and pseudoelastic behavior of the Fe-10Ni-7Mn (wt. %) alloy after annealing at intercritical temperatures was investigated. The results revealed that applying High pressure torsion process for 20 turns on the solution annealed specimen and intercritical annealed samples at two different temperatures, 580 and 600° C for 2 hours, caused reasonable ductility with significant increase in micro-hardness, ultimate tensile strength and reduced grain size to nanometer. Phase evaluation by XRD and EBSD analysis showed that High pressure torsion process led to reverse transformation of martensite to austenite in solution annealed specimen and austenite to martensite transformation in the intercritical annealed samples. Among studied samples conducted in this research, the intercritical annealed sample at 600° C and subsequently deformed by High pressure torsion, revealed the most significant Mechanical properties. Moreover, in this sample due to the higher fraction of austenite, fine grain size and high tensile strength, and easier reversible movement of the fcc/hcp interface, more amount of pseudoelasticity was achieved in comparison to the others samples. The d-spacing of the specimen without heat treatment, calculated byX-Ray Diffraction, had a little increase due to clustering. In addition, the surface morphology by optical microscope confirmed this behavior of Cu– Ni alloys in the different heat treatment.

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APA: Copy

Javadzadeh Kalahroudi, Faezeh, Koohdar, Hamidreza, Shirazi, Hasan, Jafarian, Hamidreza, & NILI AHMADABADI, MAHMOUD. (2018). Effect of Severe Plastic Deformation by High Pressure Torsion on the Microstructure, Mechanical Properties and Pseudoelastic Behavior of the Fe-10Ni-7Mn (wt. %) Steel after Intercritical Annealing treatment. METALLURGICAL ENGINEERING, 21(3 (71) ), 176-186. SID. https://sid.ir/paper/397861/en

Vancouver: Copy

Javadzadeh Kalahroudi Faezeh, Koohdar Hamidreza, Shirazi Hasan, Jafarian Hamidreza, NILI AHMADABADI MAHMOUD. Effect of Severe Plastic Deformation by High Pressure Torsion on the Microstructure, Mechanical Properties and Pseudoelastic Behavior of the Fe-10Ni-7Mn (wt. %) Steel after Intercritical Annealing treatment. METALLURGICAL ENGINEERING[Internet]. 2018;21(3 (71) ):176-186. Available from: https://sid.ir/paper/397861/en

IEEE: Copy

Faezeh Javadzadeh Kalahroudi, Hamidreza Koohdar, Hasan Shirazi, Hamidreza Jafarian, and MAHMOUD NILI AHMADABADI, “Effect of Severe Plastic Deformation by High Pressure Torsion on the Microstructure, Mechanical Properties and Pseudoelastic Behavior of the Fe-10Ni-7Mn (wt. %) Steel after Intercritical Annealing treatment,” METALLURGICAL ENGINEERING, vol. 21, no. 3 (71) , pp. 176–186, 2018, [Online]. Available: https://sid.ir/paper/397861/en

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