An investigation on the microstructure and mechanical properties of direct-quenched and tempered AISI 4140 steel

Meysami, Amirhossein; Ghasemzadeh, Reza; Seyedein, S.H.; Aboutalebi, M.R.

doi:10.1016/j.matdes.2009.09.040

Cited by 65 publications

(30 citation statements)

References 6 publications

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“…Thus, the combination of the above two factors leads to the sharp decreasing of yield strength. Similar phenomena have also been studied in other high‐strength steels . They all found that with the increase of the austenitizing temperature, the grain size of the high strength steel becomes coarser, so that the tensile strength and the yield strength gradually decrease .…”

Section: Resultssupporting

confidence: 70%

Austenitizing Behavior of Laser Solid Formed Ultrahigh-Strength 300 M Steel

Liu

Lin

Song

et al. 2017

steel research int.

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The influence of austenitizing treatment on the microstructure and mechanical properties of laser solid formed (LSFed) 300M steel is investigated within the austenitizing temperature range of 870–1050 °C. It is found that the dendritic segregation in 300M steel deposits (formed in the laser solid forming) gradually reduces with the increase of the austenitizing temperature, and even completely disappears when the austenitizing temperature reaches 1050 °C. Besides, the austenite grains and martensite packets in the LSFed 300M steel deposits changes little when the austenitizing temperature rises from 870 to 950 °C, but significantly coarsenes at the austenitizing temperature above 950 °C. The tensile test shows that the tensile strength of the samples reaches 2325 MPa after austenitizing heat treatment at 870 °C and, then, decreases slightly with the increase of the austenitizing temperature. For yields strength, it decreases slightly when the austenitizing temperature reaches 870–950 °C, while sharply decreases when the austenitizing temperature is above 950 °C. Moreover, a little effect of austenitizing temperature on the elongation and percentage reduction of area of the LSFed 300M steel is exhibited.

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Section: Resultssupporting

confidence: 70%

Austenitizing Behavior of Laser Solid Formed Ultrahigh-Strength 300 M Steel

Liu

Lin

Song

et al. 2017

steel research int.

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“…The influence of microstructure on mechanical properties of low alloy steels has been a subject of considerable research interest in physical metallurgy [1][2][3]. The coarse microstructure of conventionally developed hot rolled ferritic/pearlitic plain carbon steels often makes it impossible to obtain concurrently good ductility, toughness and high strength.…”

Section: Introductionmentioning

confidence: 99%

The effect of single and double quenching and tempering heat treatments on the microstructure and mechanical properties of AISI 4140 steel

et al. 2012

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“…5). Thus, the only reasonable explanation for differences in the properties of the tested material is the presence of inclusions accumulated in the cross-sections of samples used in the static tensile test and variations in the size of prior austenite grains [10,12,13]. …”

Section: Resultsmentioning

confidence: 99%

“…An increase in this temperature improves plastic properties, toughness included [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Tempering Temperature on the Mechanical Properties of Cast L35HM Steel

Zapała

Kalandyk

Wawro

2017

Archives of Foundry Engineering

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A possibility to control the strength, hardness and ductility of the L35HM low-alloy structural cast steel by the applied tempering temperature is discussed in the paper. Tests were carried out on samples taken from the two randomly selected industrial melts. Heat treatment of the cast samples included quenching at 900 °C, cooling in an aqueous solution of polymer, and tempering at 600 and 650 °C. The obtained results showed that the difference in the tempering temperature equal to 50 °C can cause the difference of 121 MPa in the values of UTS and of 153 MPa in the values of 0.2%YS. For both melts tempered at 600 °C, the average values of UTS and 0.2%YS were equal to 995 MPa and 933 MPa, respectively. The values of EL and RA did not show any significant differences. Attention was drawn to large differences in strength and hardness observed between the melts tempered at 600 and 650 °C. Despite differences in the mechanical properties of the examined cast steel, the obtained results were superior to those specified by the standard.

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An investigation on the microstructure and mechanical properties of direct-quenched and tempered AISI 4140 steel

Cited by 65 publications

References 6 publications

Austenitizing Behavior of Laser Solid Formed Ultrahigh-Strength 300 M Steel

Austenitizing Behavior of Laser Solid Formed Ultrahigh-Strength 300 M Steel

The effect of single and double quenching and tempering heat treatments on the microstructure and mechanical properties of AISI 4140 steel

Effect of Tempering Temperature on the Mechanical Properties of Cast L35HM Steel

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