Investigation of Microstructure and Mechanical Properties of Ultra High Strength Bainitic Steel

2013 ◽  
Vol 313-314 ◽  
pp. 77-81
Author(s):  
M.H. Sheikh Ansari ◽  
M. Aghaie-Khafri
Keyword(s):  
Mechanical Properties ◽  
Alloy Steel ◽  
High Strength ◽  
Lower Bainite ◽  
Good Combination ◽  
Bainitic Steel ◽  
Low Alloy Steel ◽  
Tempered Martensite ◽  
Medium Carbon ◽  
Bainitic Steels

In this study, medium carbon low alloy steel was used to obtain bainitic structures. The lower bainite and tempered martensite-lower bainite structures were achieved by isothermal austempering and up quenching treatment, respectively. Based on the results obtained these structures showed a very good combination of strength and toughness. Furthermore, it has been shown that austenitization time and temperature, as well as austempering time and temperature play a major role in achieving ultra-high strength bainitic steels.

Mechanical Properties of a Medium Carbon Low Alloy Steel Processed by Two Step Austempering Process

2010 ◽  
Vol 638-642 ◽  
pp. 3453-3458 ◽  
Author(s):  
Susil K. Putatunda ◽  
Abhijit Deokar ◽  
Gowtham Bingi
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Yield Strength ◽  
Alloy Steel ◽  
High Yield ◽  
Bainitic Steel ◽  
Low Alloy Steel ◽  
High Yield Strength ◽  
Medium Carbon

A new bainitic steel with a combination of exceptionally high yield strength and fracture toughness has been developed. This steel has been synthesized by austempering a medium carbon low alloy steel by a novel two-step austempering process. The influence of this two-step austempering on the microstructure and the mechanical properties of this new steel have been examined.

Promising Bendability of a New As-Rolled Medium-Carbon, Low-Alloy Steel with Isothermal Upper and Lower Bainitic Microstructure

2021 ◽  
Vol 1016 ◽  
pp. 624-629
Author(s):  
Vahid Javaheri ◽  
Antti Kaijalainen ◽  
Sakari Pallaspuro ◽  
David Porter ◽  
Jukka I. Kömi
Keyword(s):  
Alloy Steel ◽  
High Strength ◽  
Lower Bainite ◽  
Hot Strip Mill ◽  
Low Alloy Steel ◽  
Medium Carbon ◽  
Direct Quenching ◽  
Hot Strip ◽  
Bainitic Microstructure ◽  
Bending Behavior

Bending behavior of a new thermomechanically processed low-alloy steel containing 0.40 wt.% carbon has been investigated. The processing included laboratory hot rolling to 10 mm thick strips followed by direct quenching to different quench-stop temperatures followed by slow furnace cooling to room temperature stimulating hot strip mill processing. The final microstructures were upper and lower bainite with yield strengths of a ~700 and ~1200 MPa, respectively. Local microstructures were characterized using a field-emission scanning electron microscope, microhardness profiles were measured, and bendability was determined using three-point brake press bending. The minimum applicable punch radius for a defect-free bend was 28 mm (2.8 times thickness) for the high-strength lower bainitic microstructure, while it was much smaller, i.e. 20 mm (2.0 times thickness) for the lower strength upper bainitic microstructure. Fractographic examination of the cracked surfaces revealed a more ductile fracture behavior for the upper bainitic microstructure.

scholarly journals Metallurgical and mechanical properties of laser welded high strength low alloy steel

2016 ◽  
Vol 7 (3) ◽  
pp. 463-472 ◽  
Author(s):  
Ramachandran Oyyaravelu ◽  
Palaniyandi Kuppan ◽  
Natarajan Arivazhagan
Keyword(s):  
Mechanical Properties ◽  
Alloy Steel ◽  
High Strength ◽  
Low Alloy Steel

Correlating microstructural features and mechanical properties with abrasion resistance of a high strength low alloy steel

Wear ◽  
2003 ◽  
Vol 254 (1-2) ◽  
pp. 120-128 ◽  
Author(s):  
A.K. Jha ◽  
B.K. Prasad ◽  
O.P. Modi ◽  
S. Das ◽  
A.H. Yegneswaran
Keyword(s):  
Mechanical Properties ◽  
Alloy Steel ◽  
Abrasion Resistance ◽  
High Strength ◽  
Low Alloy Steel
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