Austempering in low-C steels: microstructure development and nanohardness characterization

Taboada, Mari Carmen; Elizalde, M.R.; Jorge-Badiola, D.

doi:10.1007/s10853-018-3159-6

Cited by 10 publications

(5 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, if the grain boundary length measured at 2 • corresponding to the DF population (see Figure 10) is compared to the evolution of the dislocation density plotted in Figure 11 in the same ferrite family, a similar progression in both parameters is then observed. On the other hand, the small differences in hardness observed in Figure 4c may be attributed to the formation of a substructure (high density of LAGB) within the deformed ferrite population, as hardness increases in the vicinities of the grain boundaries [12,13].…”

Section: Relation Between Dislocation Density Nanohardness and Strain...mentioning

confidence: 97%

“…In this context, nanoindentation would seem to be a suitable technique to evaluate the mechanical properties of a mixed microstructure and, to this end, nanohardness measurements were calculated in order to estimate the hardness of the non-deformed ferrite (NDF) and deformed ferrite (DF) populations separately in the work presented here. Nanoindentation has been widely used in multiphase steels in order to differentiate between phases and characterize each constituent mechanically [9][10][11][12][13]. Rodriguez et al [10] measured the hardness of different phases and researched the influence of the indentation size effect.…”

Section: Introductionmentioning

confidence: 99%

“…They observed that in the case of ferritic steel with 0.06% carbon content, hardness varies from about 2.5 to 3.3 GPa when indent depth decreases from 200 to 50 nm. Taboada et al [13] used the nanoindentation technique for bainite matrix-based multiphase microstructures and analyzed differences between the different phases. They reported that the high-carbon martensite in the Martensite-Austenite (MA) phase is the hardest phase detected, while the bainite phase is the softest.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of Strain Partitioning in Intercritically Deformed Microstructures via Interrupted Tensile Tests

Mayo

Isasti

Rodríguez-Ibabe

et al. 2021

Metals

View full text Add to dashboard Cite

Intercritically deformed steels present combinations of different types of ferrite, such as deformed ferrite (DF) and non-deformed ferrite (NDF) grains, which are transformed during the final deformation passes and final cooling step. Recently, a grain identification and correlation technique based on EBSD has been employed together with a discretization methodology, enabling a distinction to be drawn between different ferrite populations (NDF and DF grains). This paper presents a combination of interrupted tensile tests with crystallographic characterization performed by means of Electron Backscatter Diffraction (EBSD), by analyzing the evolution of an intercritically deformed micro-alloyed steel. In addition to this, and using the nanoindentation technique, both ferrite families were characterized micromechanically and the nanohardness was quantified for each population. NDF grains are softer than DF ones, which is related to the presence of a lower fraction of low-angle grain boundaries. The interrupted tensile tests show the different behavior of low- and high-angle grain boundary evolution as well as the strain partitioning in each ferrite family. NDF population accommodates most of the deformation at initial strain intervals, since strain reaches 10%. For higher strains, NDF and DF grains behave similarly to the strain applied.

show abstract

Section: Relation Between Dislocation Density Nanohardness and Strain...mentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Strain Partitioning in Intercritically Deformed Microstructures via Interrupted Tensile Tests

Mayo

Isasti

Rodríguez-Ibabe

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…The tensile properties of steels are directly controlled by the strength of the matrix, which is (BF + FM) for TBF, (PM + BF + FM) for QP, and stability of RA. Nanoindentation measurements show that the hardness of BF, low-carbon martensite, high-carbon martensite and RA is 5-6, 7-11, 10-14 and 6-7.5 GPa, respectively [42]. The yield stress of the FM (i.e.…”

Section: Relationship Between Microstructure and Mechanical Propertiesmentioning

confidence: 99%

Heat treatment effects on microstructure and properties of advanced high-strength steels

Chen

Mostert

Aarnts

2023

Materials Science and Technology

View full text Add to dashboard Cite

The effects of the austempering time on the microstructure and properties of two third-generation high-strength steels are investigated for austempering (TBF), and for quenching and partitioning (QP). The process parameters are chosen according to the capacity of an existing continuous annealing or galvanising line. More than 10% retained austenite can be stabilised although carbides start to form at short overageing times with the simulated cycles. The product of the tensile strength and total elongation for TBF is higher than for QP, and it peaks with increasing austempering time for TBF, but decreases monotonously for QP. The hole expansion capacity for QP is higher than for TBF and it peaks with austempering time for both TBF and QP.

show abstract

“…There has been a recent research interest to relate the micro-scale deformation behaviour of the individual phase constituents to the tensile properties of multiphase steels [22][23][24][25][26][27][28]. However, none of those studies extended that approach to explaining the impact toughness.…”

Section: Introductionmentioning

confidence: 99%

Effect of coiling temperature on impact toughness of hot rolled ultra-high-strength multiphase steel strips

Mandal

Ghosh

Chakrabarti

et al. 2021

Materials Science and Engineering: A

View full text Add to dashboard Cite

Austempering in low-C steels: microstructure development and nanohardness characterization

Cited by 10 publications

References 50 publications

Analysis of Strain Partitioning in Intercritically Deformed Microstructures via Interrupted Tensile Tests

Analysis of Strain Partitioning in Intercritically Deformed Microstructures via Interrupted Tensile Tests

Heat treatment effects on microstructure and properties of advanced high-strength steels

Effect of coiling temperature on impact toughness of hot rolled ultra-high-strength multiphase steel strips

Contact Info

Product

Resources

About