In this work, two advanced high-strength steels (AHSS) have been developed by designing alloy systems with suitable alloying elements, Mn, Si, Al, and Cr, and postforming heat treatment processes. Thermomechanical process of ∼90% forging reductions has been applied on the designed alloys at a temperature of 1100 °C, followed by austenitizing above AC3. Four cooling rates, air-cooling, air-cooling with tempering, oil quenching with tempering, and water quenching with tempering, have been applied on the forged samples. The results revealed that the estimated tensile properties of the ferrite/bainite microstructures of alloy A, without Cr, is situated between the bands of the first and the current third generation AHSS, whereas the estimated properties corresponding to the ferrite/fine bainite with 8% retained austenite of alloy B, with Cr, is overlapped with the properties exhibited by the current third generation of AHSSs. The thermomechanical process conducted on the alloy containing Cr has developed steel with tensile strength up to 1790 MPa.
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April 2018
Research-Article
Effect of Cr and Thermomechanical Processing on the Microstructure and Mechanical Properties of Advanced High-Strength Steel
Abdel-Wahab El-Morsy,
Abdel-Wahab El-Morsy
Mechanical Engineering Department,
Faculty of Engineering-Rabigh,
King Abdulaziz University,
P.O. Box 344,
Rabigh 21911, Saudi Arabia;
Faculty of Engineering-Rabigh,
King Abdulaziz University,
P.O. Box 344,
Rabigh 21911, Saudi Arabia;
Mechanical Engineering Department,
Faculty of Engineering-Helwan,
Helwan University,
1st Sherif Street,
Helwan, Cairo 11792, Egypt
e-mails: aalmursi@kau.sa;
elmorsya@yahoo.com
Faculty of Engineering-Helwan,
Helwan University,
1st Sherif Street,
Helwan, Cairo 11792, Egypt
e-mails: aalmursi@kau.sa;
elmorsya@yahoo.com
Search for other works by this author on:
Ahmed I. Z. Farahat
Ahmed I. Z. Farahat
Plastic Deformation Department,
Central Metallurgical Research and
Development Institute,
1st Elfelezat Street,
El-Tebbin, Helwan 12422, Egypt
Central Metallurgical Research and
Development Institute,
1st Elfelezat Street,
El-Tebbin, Helwan 12422, Egypt
Search for other works by this author on:
Abdel-Wahab El-Morsy
Mechanical Engineering Department,
Faculty of Engineering-Rabigh,
King Abdulaziz University,
P.O. Box 344,
Rabigh 21911, Saudi Arabia;
Faculty of Engineering-Rabigh,
King Abdulaziz University,
P.O. Box 344,
Rabigh 21911, Saudi Arabia;
Mechanical Engineering Department,
Faculty of Engineering-Helwan,
Helwan University,
1st Sherif Street,
Helwan, Cairo 11792, Egypt
e-mails: aalmursi@kau.sa;
elmorsya@yahoo.com
Faculty of Engineering-Helwan,
Helwan University,
1st Sherif Street,
Helwan, Cairo 11792, Egypt
e-mails: aalmursi@kau.sa;
elmorsya@yahoo.com
Ahmed I. Z. Farahat
Plastic Deformation Department,
Central Metallurgical Research and
Development Institute,
1st Elfelezat Street,
El-Tebbin, Helwan 12422, Egypt
Central Metallurgical Research and
Development Institute,
1st Elfelezat Street,
El-Tebbin, Helwan 12422, Egypt
1Corresponding author.
Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received June 15, 2017; final manuscript received October 12, 2017; published online December 26, 2017. Assoc. Editor: Antonios Kontsos.
J. Eng. Mater. Technol. Apr 2018, 140(2): 021005 (9 pages)
Published Online: December 26, 2017
Article history
Received:
June 15, 2017
Revised:
October 12, 2017
Citation
El-Morsy, A., and Farahat, A. I. Z. (December 26, 2017). "Effect of Cr and Thermomechanical Processing on the Microstructure and Mechanical Properties of Advanced High-Strength Steel." ASME. J. Eng. Mater. Technol. April 2018; 140(2): 021005. https://doi.org/10.1115/1.4038393
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