Effect of Tempering on Mechanical Properties of V-added AISI 4335 Steel

Jha, Rajib Kumar; Dutta, Krishna; Ray, K. K.

doi:10.2355/isijinternational.50.607

Cited by 6 publications

(7 citation statements)

References 11 publications

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“…Material Characteristics. The compositions of all the selected steels are closely in following with that of the AISI 4335 grade [2,4,7] having small amount of vanadium. The co-efficient of variations (CEV=standard deviation/average value, in %) of the alloying elements in the different heats of the steel are less as compared to that of the undesired elements like S, P, Sn, Sb and As (Fig.…”

Section: Resultsmentioning

confidence: 59%

“…The ESR slugs were homogenized prior to hot forging at 1423 K followed by controlled cooling to room temperature. Specimen blanks of approximately 100 mm thickness were cut from the forged cylinders and were subjected to homogenizing, hardening and tempering as described earlier [4]. The chemical compositions of the steels exhibit C = 0.33-0.40, Si = 0.09-0.38, Mn = 0.26-0.51, S = 0.001-0.006, P = 0.002-0.012, Ni = 2.96-3.35, Cr = 0.84-1.11, Mo = 0.48-0.66, V = 0.13-0.19, Sn = 0.001-0.011, Sb = 0-0.009, As = 0-0.015 wt.…”

Section: Methodsmentioning

confidence: 99%

“…The steels so processed exhibit the desired combination of strength, ductility and toughness properties [1][2][3]. The first four steps in processing Ni-Cr-Mo low alloy steels are aimed to reduce the inclusion content and the tramp elements whereas the final step is carried out to achieve suitable combination of ductility and toughness with desirable hardness and strength [4].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Search for Rapid Quality Control of Ni-Cr-Mo Low Alloy Steels Using Multifaceted Approaches for Fracture Toughness Estimation

Ray

Chegondi

Roy

et al. 2014

AMR

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This report aims to illustrate some multifaceted approaches for estimating fracture toughness of high-strength Ni-Cr-Mo low alloy steels in order to search for a suitable methodology for their rapid quality control in industrial production. The chemistry, microstructure, hardness, tensile and impact toughness properties of the selected AISI 4335 grade steels from different batches of commercial productions were assessed by standard methods. Measurement of plane strain fracture toughness (KIc), dynamic fracture toughness (KId) and fracture toughness using chevron notched bend bar specimens (KIcv) have been done on the selected steels. The magnitudes of KIc depend on the amount of inclusions and tramp elements in different batches of production. The values of KId estimated by LEFM approach and KIcv are in reasonably close agreement with KIc values but the latter methodology indicates the potential to be an alternate approach. Comparative assessments of KId and KIcv values with respect to KIc values of the steels have been made using concepts based on fracture mechanics and inherent characteristics of test parameters.

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Section: Resultsmentioning

confidence: 59%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Search for Rapid Quality Control of Ni-Cr-Mo Low Alloy Steels Using Multifaceted Approaches for Fracture Toughness Estimation

Ray

Chegondi

Roy

et al. 2014

AMR

Self Cite

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“…[ 10,11 ] Meanwhile, quenching and tempering are well‐proven means to strengthen the alloy steel, which are mainly due to the precipitation of fine alloy carbides and secondary hardening effect during tempering. [ 12 ] Many alloying elements such as Cr, [ 13,14 ] Mo, [ 15 ] and V [ 16 ] dissolved in the matrix at high temperature can suppress the growth of austenite, thereby refining the grain size and increasing the contribution of grain size refinement strengthening. [ 17 ] Thus, many studies have been conducted on the relationship between heat treatment conditions and mechanical properties of the alloy steel.…”

Section: Introductionmentioning

confidence: 99%

Continuous Heating/Cooling Transformation Kinetics of a Novel CrNiMoV Steel for Large Structural Parts

Zhang,

Tian

et al. 2023

steel research int.

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Continuous heating transformation (CHT) and continuous cooling transformation (CCT) characteristics as well as phase transformation kinetics of a novel Cr–Ni–Mo–V steel for large structural parts are studied using a Gleeble‐3500 thermal–mechanical simulator. CCT curves are obtained. The results show that carbides in initial structure can be completely dissolved during CHT as the heating rates are not greater than 0.2 °C s−1. The final microstructure exhibits obvious sensitivity to cooling rate. It contains martensite with or without bainite. Besides, kinetic models of austenitization are established, and it is confirmed that diffusion is the major mechanism of austenitic transformation in steel during CHT. Meanwhile, bainitic phase transformations kinetic model is developed based on the J–M–A model. The fitted Avrami indexes n combined with transmission electron microscope reveal that the bainite nucleation sites of the steel are mainly located at the prior austenite grain boundaries, and the growth of bainite grains mainly follows a 2D mode. The kinetics of martensitic transformation is better modeled based on the K–M equation. A deep understanding of kinetics and microstructure characteristics during CHT and CCT is of great significance to regulate the final performance of the novel steel under development.

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“…The manufacturing process for these steels usually consists of primary melting in electric arc furnace, secondary refining in ladle furnace facilitated with vacuum degassing, casting in to ingots, electro slag refining followed by forging and heat treatment, which consists of homogenizing, quenching and tempering. The resultant tempered martensitic microstructure exhibits the desired combination of strength, ductility and toughness properties in these steels [1][2][3][4][5]. The processing of the material up to ESR is aimed to reduce the inclusion content and the undesirable elements whereas the heat treatment is done to achieve suitable degree of ductility and toughness at the cost of hardness and strength.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Fracture Resistance of a Forged Quality Medium Carbon Alloy Steel

Ray

Jha²

2011

KEM

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Impact and fracture toughness of a large number of medium carbon alloy steel specimens have been ascertained using standard ASTM procedures, apart from examining their chemistry, microstructure, cleanliness, tensile behaviour and fracture surfaces. The results indicate that the scatter associated with ductility, impact and fracture toughness is considerable unlike that for strength or hardness. Analyses of the role of undesirable elements on toughness properties indicate that the scatter associated with fracture resistance of the steel primarily originates from the amount of tramp elements.

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Effect of Tempering on Mechanical Properties of V-added AISI 4335 Steel

Cited by 6 publications

References 11 publications

Search for Rapid Quality Control of Ni-Cr-Mo Low Alloy Steels Using Multifaceted Approaches for Fracture Toughness Estimation

Search for Rapid Quality Control of Ni-Cr-Mo Low Alloy Steels Using Multifaceted Approaches for Fracture Toughness Estimation

Continuous Heating/Cooling Transformation Kinetics of a Novel CrNiMoV Steel for Large Structural Parts

Probabilistic Fracture Resistance of a Forged Quality Medium Carbon Alloy Steel

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