Enhancing damage-resistance in low carbon martensitic steels upon dual-pass laser treatment

2021 ◽  
Vol 192 ◽  
pp. 13-18
Author(s):  
Hyun Seok Oh ◽  
Jiyun Kang ◽  
C. Cem Tasan
Keyword(s):  
Laser Treatment ◽  
Low Carbon ◽  
Martensitic Steels ◽  
Damage Resistance ◽  
Dual Pass

Phase and structural transformations in low-carbon martensitic steels

2009 ◽  
Vol 108 (2) ◽  
pp. 153-160 ◽  
Author(s):  
L. M. Kleiner ◽  
D. M. Larinin ◽  
L. V. Spivak ◽  
A. A. Shatsov
Keyword(s):  
Structural Transformations ◽  
Low Carbon ◽  
Martensitic Steels ◽  
Phase And Structural Transformations

Structure and properties of low-carbon martensitic steels

1999 ◽  
Vol 41 (8) ◽  
pp. 366-368 ◽  
Author(s):  
L. M. Kleiner ◽  
Yu. N. Simonov
Keyword(s):  
Structure And Properties ◽  
Low Carbon ◽  
Martensitic Steels

Low-carbon martensitic steels. Alloying and properties

2011 ◽  
Author(s):  
L. M. Kleiner ◽  
A. A. Shatsov ◽  
D. M. Larinin
Keyword(s):  
Low Carbon ◽  
Martensitic Steels

scholarly journals Image Processing Tool Quantifying Auto-Tempered Carbides in As-Quenched Low Carbon Martensitic Steels

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 171 ◽  
Author(s):  
Shashank Ramesh Babu ◽  
Thomas Paul Davis ◽  
Tim Haas ◽  
Antti Jarvenpää ◽  
Jukka Kömi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Image Processing ◽  
Image Segmentation ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Volume Fraction ◽  
Low Carbon ◽  
Martensitic Steels ◽  
Color Map ◽  
Scanning Electron

As-quenched low-carbon martensitic steels (<0.2 wt.% C) contain auto-tempered carbides. Auto-tempering improves the work hardening and upper-shelf impact energy; however, an efficient characterization method to determine the degree of auto-tempering has not been available. This paper demonstrates an efficient image processing tool that calculates the relative auto-tempered carbide fraction by analyzing scanning electron microscope micrographs. By the process of image segmentation, the qualitative volume fraction of auto-tempered carbides can be determined, and an associated color map produced, which distinguished the levels of auto-tempering. This image processing tool could become useful for the optimization of new low-carbon steel’s mechanical properties.

Effect of Tempering on Bendability and Impact Property of Hot Rolled Low-Carbon Martensitic Steel

2018 ◽  
Vol 941 ◽  
pp. 474-479
Author(s):  
Sung Il Kim ◽  
Seok Jong Seo ◽  
In Shik Suh
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Impact Property ◽  
Alloying Elements ◽  
Bending Test ◽  
Low Carbon ◽  
Martensitic Steels ◽  
Tempering Temperature ◽  
Impact Properties ◽  
The Impact

We examined the effects of tempering process and alloying elements on the microstucture, tensile properties, bendability and impact property of direct quenched (DQ), and re-austenitizing and quenched (RQ) low-carbon martensitic steels. For this purpose, four low carbon martensitic steels (Fe-0.07C-1.8Mn-Cr-Nb-Ti-B) were selected. We have investigated the effects of tempering temperature and alloying elements of chromium (Cr), titanium (Ti) and niobium (Nb) on mechanical properties and microstructures. Mechanical properties and microstructures were analyzed as well using tensile test, V-bending test, charpy V-notched impact test and electron microscopy for DQ, DQ and tempered (DQ-T), RQ and RQ and tempered (RQ-T) low-carbon martensitic steels. It has been found that the as-quenched microstructures of the DQ and RQ specimens were fully martensitic structure. Prior austenite grain size and effective grain size after quenching were larger in the case of RQ steel. In both cases, tempering made the needle-shaped carbides. It is shown that the strength decreased when the tempering temperature increased. The strengths of the DQ and DQ-T steels were 30~50MPa higher than those of the RQ and RQ-T steels. Despite the higher strength of the DQ and DQ-T states, both had similar impact properties with the RQ and RQ-T states. However, the impact properties of the Nb added RQ and RQ-T steels with fine martensite morphology exhibited higher than those of DQ and DQ-T steels.

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