Effect of ferrite volume fraction on work hardening behavior of high bainite dual phase (DP) steels

2008 ◽  
Vol 477 (1-2) ◽  
pp. 306-310 ◽  
Author(s):  
Mohammad Reza Akbarpour ◽  
A. Ekrami
Keyword(s):  
Work Hardening ◽  
Volume Fraction ◽  
Dual Phase ◽  
Work Hardening Behavior ◽  
Hardening Behavior ◽  
Dp Steels

Topological Analysis of Martensite Morphology in Dual-Phase Steels

2011 ◽  
Vol 409 ◽  
pp. 725-729 ◽  
Author(s):  
Naoko Sato ◽  
Mayumi Ojima ◽  
Satoshi Morooka ◽  
Yo Tomota ◽  
Yoshitaka Adachi
Keyword(s):  
Mechanical Properties ◽  
Work Hardening ◽  
Annealing Temperature ◽  
Volume Fraction ◽  
Intercritical Annealing ◽  
Topological Analysis ◽  
Three Dimensional ◽  
Dual Phase ◽  
Hardening Behavior ◽  
Dp Steels

Martensite morphology such as connectivity or dispersivity in ferrite (F)/martensite (M) dual-phase (DP) steels was investigated from topological viewpoint to reveal the effect of the martensite morphology on the mechanical properties. Topological analysis permits evaluation of the microstructural connectivity and dispersivity by measuring the number of handles, independent bodies and genus, etc. The topological analysis was performed on three-dimensional (3D) reconstructed images of the microstructure with different connectivity, dispersivity, volume fraction and hardness of martensite in DP steels that were prepared by changing the intercritical annealing temperature. The connectivity and the volume fraction of martensite increased while the dispersivity and hardness of it decreased with increasing annealing temperature. The effect of connectivity and dispersivity as well as volume fraction and hardness, in particular, on work hardening behavior was individually evaluated at a given strain.

scholarly journals Investigation of intercritical heat treatment temperature effect on microstructure and mechanical properties of dual phase (DP) steel

10.30544/293 ◽  
2017 ◽  
Vol 23 (2) ◽  
pp. 143-152
Author(s):  
Mohammad Davari ◽  
Mehdi Mansouri Hasan Abadi
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Work Hardening ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Dual Phase ◽  
Work Hardening Behavior ◽  
Hardening Behavior ◽  
Heat Treated ◽  
Intercritical Heat Treatment

In the present study, the effect of intercritical heat treatment temperature on the tensile properties and work hardening behavior of ferritic-martensitic dual-phase steel have been investigated utilizing tensile test, microhardness measurement and microscopic observation. Plain carbon steel sheet with a thickness of 2 mm was heat treated at 760, 780, 800, 820 and 840 °C intercritical temperatures. The results showed that martensite volume fraction (Vm) increases from 32 to 81%with increasing temperature from 760 to 840 °C. The mechanical properties of samples were examined by tensile and microhardness tests. The results revealed that yield strength was increased linearly with the increase in Vm, but the ultimate strength was increased up to 55% Vm and then decreased afterward. Analyzing the work hardening behavior in term of Hollomon equation showed that in samples with less than 55% Vm, the work hardening took place in one stage and the work hardening exponent increased with increasing Vm. More than one stage was observed in the work hardening behavior when Vm was increased. The results of microhardness test showed that microhardness of the martensite is decreased by increase in heat treatment temperature while the ferrite microhardness is nearly constant for all heat-treated samples.

Work-Hardening Behavior of Cold Rolled Interstitial-Free Steel Sheet and Dual Phase High Strength Steel Sheets Subjected to Two-Stage, Coaxial and Non-Coaxial Tension/Compression

2015 ◽  
Vol 651-653 ◽  
pp. 83-88 ◽  
Author(s):  
Satoshi Shirakami ◽  
Shigeru Yonemura ◽  
Tohru Yoshida ◽  
Noriyuki Suzuki ◽  
Toshihiko Kuwabara
Keyword(s):  
Work Hardening ◽  
Steel Sheet ◽  
High Strength ◽  
Dual Phase ◽  
Interstitial Free ◽  
If Steel ◽  
Two Stage ◽  
Work Hardening Behavior ◽  
Hardening Behavior ◽  
Cold Rolled

In-plane tension/compression tests of a cold rolled interstitial-free (IF) steel and sheet a 980MPa dual phase high strength steel sheet (980DP) were carried out to investigate the work-hardening behavior under two-stage loading paths. The two-stage loading paths consist of the uniaxial tension/compression for the rolling direction (RD) followed by unloading and subsequent uniaxial tension/compression in the 0°, 45° and 90° directions from the first loading direction (0°-, 45°- and 90°-loading). The work hardening behavior in the second loading was different between the 980DP and the IF steel. It was found that the work hardening behaviors were significantly affected by the inner product of the strain rate mode tensors for the first and second loading and that the effect of the deformation mode (tension/compression) was small.

Experimental Investigation of Isotropic and Kinematic Hardening in Al-3Cu-0.05Sn (wt%)

2007 ◽  
Vol 561-565 ◽  
pp. 1849-1852
Author(s):  
Julien da Costa Teixeira ◽  
Laure Bourgeois ◽  
Chad W. Sinclair ◽  
Christopher R. Hutchinson
Keyword(s):  
Experimental Investigation ◽  
Size Distribution ◽  
Work Hardening ◽  
Volume Fraction ◽  
Kinematic Hardening ◽  
Tensile Tests ◽  
Number Density ◽  
Work Hardening Behavior ◽  
Hardening Behavior

The work hardening behavior of an Al-3Cu-0.05Sn (wt %) alloy was studied using tensile tests and Bauschinger tests. Emphasis is placed on the influence of the precipitation state (number density, size distribution and volume fraction) and separating the isotropic and kinematic components of the work hardening.

Investigation on Non-Equivalence of Dislocation Types on Work Hardening Behavior of Dual-Phase Steel

2021 ◽  
Author(s):  
Nan Wang ◽  
Yongnan Chen ◽  
Gang Wu ◽  
Qinyang Zhao ◽  
Zhen Zhang ◽  
...  
Keyword(s):  
Work Hardening ◽  
Dual Phase Steel ◽  
Dual Phase ◽  
Work Hardening Behavior ◽  
Hardening Behavior
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