Effect of holding time on the microstructure and mechanical properties of dual-phase steel during intercritical annealing

Zhuang, Łi; Wu, Di; Lü, Wei; Yu, Huan-Huan; Shao, Zhenyao

doi:10.1007/s11595-015-1118-5

Cited by 16 publications

(8 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Holding temperature is one of the decisive parameters for the microstructure. Li et al suggested that the microstructure did not change significantly when increasing the holding time of the intercritical annealing and thus it did not improve the mechanical properties . With increasing holding temperature, in addition to the bainite transformation occurs in the steel the martensite content decreases and the amount of austenite increases.…”

Section: Discussionmentioning

confidence: 99%

“…For instance, it can be an intercritical annealing followed by a fast cooling and isothermal holding at a temperature between the bainitic (or martensitic) transformation start temperature B s (or M s ) and the bainitic (or martensitic) transformation finish temperature B f (M f ) . Hitherto, the influences of heat treatment parameters on the transformed microstructures and mechanical properties have been studied individually by many investigators and also been the major issue for a number of conferences . These previous results suggest that the distribution, volume fraction, morphology, and composition of the multiphase are dependent on the heat treatment parameters, e.g., intercritical temperature and time .…”

Section: Introductionmentioning

confidence: 99%

“…Hitherto, the influences of heat treatment parameters on the transformed microstructures and mechanical properties have been studied individually by many investigators and also been the major issue for a number of conferences . These previous results suggest that the distribution, volume fraction, morphology, and composition of the multiphase are dependent on the heat treatment parameters, e.g., intercritical temperature and time . However, to the author's knowledge, rare work has been done on the influences of isothermal holding temperature on the microstructure and properties of low carbon FBDP/FMDP steels, especially on the steels with 0.22 mass% C and strong carbide‐forming elements such as Nb and Cr …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Holding Temperature on Microstructure and Mechanical Properties of High‐Strength Multiphase Steel

Hou

Zheng

et al. 2015

steel research int.

Self Cite

View full text Add to dashboard Cite

Isothermal holding following intercritical annealing is usually used in microstructure control, e.g., fractions and stabilities of retained-austenite (RA). Fe-0.22C-2.5Mn-0.47Si-0.41Cr-0.02Nb (mass%) steel is subjected to intercritical annealing and isothermal treatment at 250, 300, 350, and 400 8C to elucidate the impact on microstructures and mechanical properties by means of electron microscopy and uniaxial tensile test, respectively. The results show that the isothermal holding temperature is vital for the formed phases, including the morphology, volume fraction, and carbon content of RA in the processed steels. The tensile test results indicate that the mechanical properties including Ultra-tensile strength (UTS), Yield strength (YS), as well as Total Elongation (TEL) are attributed to the synthetic action of all constituents of phase morphology and corresponding fractions, e.g., hard-to-soft phase ratio, morphology and fraction of RA, dispersed precipitates. An excellent combination of strength-ductility of the present multiphase steel has been explained in terms of their specific microstructure.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Holding Temperature on Microstructure and Mechanical Properties of High‐Strength Multiphase Steel

Hou

Zheng

et al. 2015

steel research int.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Over the years, Dual Phase (DP) steels have become a sort after material by the automobile industries, where safety, lightweight and energy-saving materials are principal [1]. DP steel is predominantly made up of dispersed martensite grain within the ferrite matrix [2]. Its wide acceptance could be attributed to its economic value, high tensile strength, improved formability, continuous yielding behavior, crashworthiness, high strength-ductility, and high work hardening rates [3][4][5].Hence, giving it an edge over conventional steel for the manufacturing industries and welding purposes [6,7].…”

Section: Introductionmentioning

confidence: 99%

Optimization and Microstructural Evaluation of Processing Parameters on the Density and Surface Hardness of Dual Phase Steel

Olorundaisi¹

2021

SJRR

View full text Add to dashboard Cite

The body frame of the automobile is an essential and critical component of a car. This part when subjected to extreme impact, could lead to mechanical failure, which could endanger human life. The effectiveness of the material in safeguarding human life can be influenced by both the selection of materials and the manufacturing process. Dual Phase (DP) steel of 600 grades was developed from low carbon steel (0.13wt) at different temperatures and holding time using bitumen as the quenching medium. The material was developed with improved mechanical properties to withstand impact due to accidents. The influence of processing parameters on the surface hardness and density was analyzed using response surface methodology to develop a prediction model. The relationship existing between density and the hardness of Dual Phase steel was established in this study. It was discovered that the increase in density resulted in an improvement of the surface hardness as a result of the reduction in pores. The SEM micrographs revealed the extent of the dispersion of the ferrite and martensite as a function of the holding time. To ascertain the experimental outcome, a model on a statistical four-level and two factorial design method was carried out. Based on the statistical analysis, surface hardness (SH) shows a correlation coefficient of R 2 = 0.9522 while Density gave R 2 = 0.9859, P-values obtained were less than 0.1 and there is only a 0.01% chance that the F-values obtained could occur due to noise.

show abstract

“…Dual-phase steels are characterised by a high initial hardening capacity and a good ductility to strength ratio, which provides an excellent energy absorption capacity [1][2][3][4][5]. A soft ferrite matrix about which a second dispersed hard phase, generally martensite, is found in its microstructure.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Crack Growth and Fracture Toughness in a Dual Phase Steel: Effect of Increasing Martensite Volume Fraction

Velasquez¹,

Rodríguez²,

Tovar³

et al. 2020

IJAME

View full text Add to dashboard Cite

Crack growth resistance in dual-phase steel was studied. The dual phase steel microstructure was modified through heat treatments to increase the martensite volume fraction from 10% to 40%. The as-received and heat-treated samples were evaluated using a uniaxial tensile test, fatigue crack growth test, and fracture toughness test. Extended Finite Element Method (XFEM) was used to simulate the crack growth in compact tension test specimens. The results showed that an increase in martensite volume fraction is an effective way to increase the fracture resistance under different load conditions, quasistatics and dynamic, increasing the fracture toughness, tensile strength and fatigue resistance of the heat-treated material. Presence of a highest content of martensite results in formation of an important number of secondary cracks during the fatigue crack growth, which slow down the crack propagation. Moreover, martensite generates a crack closure over the crack tip, making the propagation difficult due to the irregularities caused by the crack growth on the martensite. Finally, the computational load-displacement curves are in good agreement with the experimental data.

show abstract

Effect of holding time on the microstructure and mechanical properties of dual-phase steel during intercritical annealing

Cited by 16 publications

References 18 publications

Effect of Holding Temperature on Microstructure and Mechanical Properties of High‐Strength Multiphase Steel

Effect of Holding Temperature on Microstructure and Mechanical Properties of High‐Strength Multiphase Steel

Optimization and Microstructural Evaluation of Processing Parameters on the Density and Surface Hardness of Dual Phase Steel

Fatigue Crack Growth and Fracture Toughness in a Dual Phase Steel: Effect of Increasing Martensite Volume Fraction

Contact Info

Product

Resources

About