Influence of martensite content and morphology on the toughness and fatigue behavior of high-martensite dual-phase steels

2001 ◽  
Vol 32 (9) ◽  
pp. 2207-2217 ◽  
Author(s):  
Asim Bag ◽  
K. K. Ray ◽  
E. S. Dwarakadasa
Keyword(s):  
Fatigue Behavior ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Martensite Content

Strengthening and ductilization of laminate dual-phase steels with high martensite content

2021 ◽  
Vol 65 ◽  
pp. 29-37
Author(s):  
Bo Gao ◽  
Rong Hu ◽  
Zhiyi Pan ◽  
Xuefei Chen ◽  
Yi Liu ◽  
...  
Keyword(s):  
Dual Phase ◽  
Dual Phase Steels ◽  
Martensite Content

scholarly journals Estimation of Strength Properties from Microhardness Results in Dual Phase Steels with Different Martensite Volume Fraction

2018 ◽  
Vol 47 (3) ◽  
pp. 206-212 ◽  
Author(s):  
Gábor Béres ◽  
Zoltán Weltsch
Keyword(s):  
Volume Fraction ◽  
Tensile Tests ◽  
Strength Properties ◽  
Indentation Load ◽  
Experimental Investigations ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Martensite Volume Fraction ◽  
Martensite Content ◽  
Hardness Values

This study is about the effect of the martensite volume fraction and indentation load on microhardness profiles of dissimilar types Dual Phase steels and DC04 mild steel. Experimental investigations were performed by mickrovickers method with using of eight different indentation loads from 0.01 kp up to 1 kp. Besides, microscope and tensile tests were carried out to complete the estimation.The hardness profiles show similar characteristics in case of all examined steels independent from the microstructure. In the lowest load ranges at 0.01 and 0.025 kp (HV0.01 and HV0.025), there are no appropriate approximations with the martensite volume fraction, due to the high deviation of the hardness results which caused by the little indentation geometry. In higher ranges, above 0.05 kp (HV0.05), linear evaluations could be applicable. With the utilization of the fitted parameters, a definite relationship is reported in the hardness values and even in the strength and elongation properties with the martensite content. Based on these correlations such contexts are added which make contact between microhardness and strength values for the practice. The discrepancy between the measured and calculated results stay under 10 HV which is less than 5%.

scholarly journals Prediction on the Mechanical and Forming Behaviors of Ferrite-Martensite Dual Phase Steels Based on a Flow Model

2020 ◽  
Vol 26 (4) ◽  
pp. 401-407
Author(s):  
Rui-bin GOU ◽  
Wen-jiao DAN ◽  
Wei-gang ZHANG ◽  
Min YU
Keyword(s):  
Flow Model ◽  
Yield Function ◽  
Dual Phase ◽  
Cylindrical Bending ◽  
Dual Phase Steels ◽  
Martensite Content ◽  
Hardening Law ◽  
Anisotropic Yield Function ◽  
Micro Flow ◽  
Incremental Strain

An innovative flow model incorporating the mixture hardening law, anisotropic yield function, and incremental strain formulations was elaborated and applied to DP590 ferrite-martensite dual phase steel. To verify the flow model, both the macro/micro stress-strain responses and the forming patterns of DP590 steel with different martentite contents were simulated during the processes of the cup deep-drawing and the unconstrained cylindrical bending to evaluate the influence of martensite content on the mechanical and forming behavior of the steel. It was found that maternsite content has a significant impact on the macro/micromechanical and forming behavior of the steel, i.e., the ferrite and steel effective stresses and the effective macro/micro-strain distribution in the cup. Under the unconstrained cylindrical bending, the simulated effective maximum macro/micro-strains were in good agreement with the calculated results from the mixture law-based model. It was concluded that the Buaschinger effect is the main reason for an 8 % error between the simulated and experimental results. The flow model was proved to predict the macro/micro flow and forming behavior of the dual phase steels with a good accuracy.

CONTROL OF MICROSTRUCTURES OF FERRITE/ BAINITE (F/B) DUAL-PHASE STEELS AND ANALYSIS OF THEIR RESISTANCE TO DEFORMATION BEHAVIOR

2012 ◽  
Vol 48 (3) ◽  
pp. 298 ◽  
Author(s):  
Wenjin NIE ◽  
Chengjia SHANG ◽  
Hailong GUAN ◽  
Xiaobing ZHANG ◽  
Shaohui CHEN
Keyword(s):  
Deformation Behavior ◽  
Dual Phase ◽  
Dual Phase Steels ◽  
Resistance To Deformation
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