Influence of the thermo–mechanical treatment parameters on the inhomogeneity of the austenite structure and mechanical properties of the Cr–Mo steel with Nb, Ti, and B microadditions

Adamczyk, J.; Opiela, M.

doi:10.1016/j.jmatprotec.2004.07.148

Cited by 17 publications

(15 citation statements)

References 2 publications

(1 reference statement)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More precisely, it was realized that the process is sensitive to the initial microstructure, the reheating speed (heating rates higher than 250 °C/s are needed), the peak temperature (T p ) and the time (t p ) spent at the peak temperature [6,[12][13][14]23]. Altogether, we believe that the use of UF cycles may allow mixtures of bainite-martensite to be experimentally obtained.…”

Section: Preliminary Resultsmentioning

confidence: 99%

“…The volume fraction, morphology and distribution of retained austenite and/or martensite strongly affect mechanical properties of AHSS [4][5][6]. In these materials (TRIP, TWIP, CP, PM) necking and fracture are subdued and pushed to large strains due to continuous work hardening, the latter determined by the heterogeneous distribution of dislocations 6.…”

Section: Overview Of the Evolution Of 1st And 2nd Generation Of Advanmentioning

confidence: 99%

See 1 more Smart Citation

A New Opportunity for the Design of Advanced High Strength Steels with Heterogeneous-Phase Microstructures via Rapid Thermal Processing

Papaefthymiou¹

2017

J Nanosci Adv Tech

View full text Add to dashboard Cite

In the following paper, the developments in Advanced High Strength Steels (AHSS) that are used in automotive industry are summarized. AHSS show good formability while maintaining high strength values. These properties can be achieved via grain refining, mixed ferritic microstructures and by leveraging phenomena such as Transformation Induced Plasticity and Twinning Induced Plasticity (TWIP). However, time and energy consuming thermal processes as well as expensive alloying additions should be employed in order to achieve these properties. The new era of AHSS requires combinations of greater strength -ductility via ultra-grain -refined ferrite, martensite, bainite and austenite at a cost significantly less than the previous grades. It is envisaged that microstructural evolution under the effect of ultra-fast heating and the subsequent quenching or air cooling may result to a new outlook for alloy design. The key aspect in this technological possibility is the effect of chemical heterogeneity in the initial microstructure. The inhomogeneous microstructure remains unchanged due to the rapid reheating as a result of the restriction of the time available for solid state diffusion. A promising example of such technology is the singlestepped reheating of steel which, although unconventional, has been observed to lead to complex microstructures of chemical heterogeneity.

show abstract

Section: Preliminary Resultsmentioning

confidence: 99%

Section: Overview Of the Evolution Of 1st And 2nd Generation Of Advanmentioning

confidence: 99%

A New Opportunity for the Design of Advanced High Strength Steels with Heterogeneous-Phase Microstructures via Rapid Thermal Processing

Papaefthymiou¹

2017

J Nanosci Adv Tech

View full text Add to dashboard Cite

show abstract

Section: Microstructure Of Thermomechanically-processed Platesmentioning

confidence: 99%

“…The presence of M23C6type dispersive carbides ( Figure 8) was also revealed with the carbon replica method. Precipitation of these carbides is favoured by the decreasing solubility of alloying elements in austenite along with a decrease in temperature [37], which was the case during holding of rolled sections in air before hardening. Increasing the time of intervals between successive passes through the use of a retention cover allows for isothermal holding of the rolled plate section prior to hardening for time t0.5, according to the second variant of thermomechanical treatment (II TMP).…”

Section: Microstructure Of Thermomechanically-processed Platesmentioning

confidence: 99%

Microstructure and Anisotropy of Plastic Properties of Thermomechanically-Processed HSLA-Type Steel Plates

Opiela

Grajcar

2018

Metals

View full text Add to dashboard Cite

The paper presents the investigation results of the impact of shear bands on microstructure, mechanical properties, and anisotropy of plastic properties of HSLA (high-strength, low-alloy) type steel plates, produced in the process of thermomechanical rolling. A lack of conditions ensuring the complete static recrystallization between successive roll passes leads to localization of plastic deformation and formation of shear bands in dynamically-recrystallized austenite enriched with carbon and other interstitial elements, which transform into carbide segregation bands during tempering. These bands are the cause of low impact resistance of rolled plates, especially in the transverse direction, and the high degree of anisotropy of plastic properties in the plates. formation of shear bands in the austenite in the direction of rolling [18][19][20]. These bands may cause the anisotropy of plastic properties in the plates and decrease their impact toughness [21-23]. Materials and MethodsThe tests were carried out on low-carbon toughened steel. The chemical composition is shown in Table 1. The requirements for weldable plates are: YS > 960 MPa and a ductile-brittle transition temperature T 45J equal to −40 • C. The carbon equivalent of this steel, calculated on its chemical composition, is equal to C E = 0.55. The steel is characterized by high metallurgical cleanliness, associated with low content of P and S.

show abstract

“…Examples include forging bars, wire rods, and rolled plates of low-carbon and medium-carbon microalloyed steels (Ref [3][4][5][6]. Scant research has been done on high-carbon alloyed steel for heavy forging.…”

Section: Introductionmentioning

confidence: 99%

The Effect of the Ausforging-and-Tempering on the Microstructure and Mechanical Properties of Steel 86CrMoV7

Xiao

Qiao

Guan

2008

J. of Materi Eng and Perform

View full text Add to dashboard Cite

Thermomechanical treatment as an effective method has been carried out in order to obtain a better combination of high strength and excellent toughness. In this work, the hot deformation behavior of 86CrMoV7 steel has been studied, and then the process of ausforging has been designed. The microstructures and mechanical properties of 86CrMoV7 steel by (1) direct quenching after forging (ausforging) and tempering, (2) quenching-and-tempering and spheroidizing annealing have been investigated. The results show ausforging-and-tempering provides high strength but same toughness as classical quenchingand-tempering.

show abstract

Influence of the thermo–mechanical treatment parameters on the inhomogeneity of the austenite structure and mechanical properties of the Cr–Mo steel with Nb, Ti, and B microadditions

Cited by 17 publications

References 2 publications

A New Opportunity for the Design of Advanced High Strength Steels with Heterogeneous-Phase Microstructures via Rapid Thermal Processing

A New Opportunity for the Design of Advanced High Strength Steels with Heterogeneous-Phase Microstructures via Rapid Thermal Processing

Microstructure and Anisotropy of Plastic Properties of Thermomechanically-Processed HSLA-Type Steel Plates

The Effect of the Ausforging-and-Tempering on the Microstructure and Mechanical Properties of Steel 86CrMoV7

Contact Info

Product

Resources

About