Effect of normalization temperatures on ductile–brittle transition temperature of a modified 9Cr–1Mo steel

Chatterjee, A. K.; Chakrabarti, Debalay; Moitra, A.; Mitra, Rahul; Bhaduri, A.K.

doi:10.1016/j.msea.2014.09.021

Cited by 68 publications

(23 citation statements)

References 37 publications

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“…Fracture toughness is used to characterize toughness. An impact test is used to give an indication of fracture toughness through measuring the resistance of the material to impact load without fracture [15], which can be used as a tool to evaluate the ductile-brittle transition temperature. In addition, hardness is also a very important parameter of material, which is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion.…”

Section: Methodsmentioning

confidence: 99%

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Effect of Rare Earth Ce on the Microstructure and Mechanical Properties of 34CrNiMo6 Steel for Wind Turbine Main Shaft

Wang

2019

Advances in Materials Science and Engineering

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The effect of rare earth Ce on mechanical properties is studied by investigating the precipitates evolution during heat treatment of 34CrNiMo6 steel. Five different rare earth Ce contents are carried out with the same holding time 3 hours. Then, the mechanical properties of 34CrNiMo6 steel are obtained under steady state conditions and impact conditions, respectively. The strength decreases while the elongation after breakage increases with the rare earth Ce content increasing. The impact absorbing energy at 20°C and −40°C increases with the rare earth Ce content increasing. Based on the experimental results, the recommended rare earth Ce content is 0.05 wt.%. The differences in mechanical properties among the different rare earth Ce contents may be the nucleation rate and growth of precipitates under different conditions. The spherification degree of cementite is more complete with rare earth Ce content, resulting in the decrease of mechanical properties and improvement of ductility.

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Section: Methodsmentioning

confidence: 99%

“…As the grain boundary could inhibit the movement of dislocation, the reduction of grain size can reduce the movement of dislocation, resulting in a signi cant e ect on the mechanical properties [15]. Hence, the tensile of 34CrNiMo6-0.05Ce steel decreases compared with that of 34CrNiMo6-0Ce.…”

Section: E Ect On Microstructures and Fracture Morphologiesmentioning

confidence: 99%

Effect of Rare Earth Ce on the Microstructure and Mechanical Properties of 34CrNiMo6 Steel for Wind Turbine Main Shaft

Wang

2019

Advances in Materials Science and Engineering

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“…19 As the grain boundary can inhibit the movement of dislocation, a reduction in the grain size can reduce the movement of dislocation, resulting in a significant effect on the mechanical properties. 15 Hence, the tensile strength of the 34CrNiMo6 steel decreases at 660°C compared with that at 570°C. In contrast, the toughness of the 34CrNiMo6 steel increases with the increasing tempering temperature due to the brittleness of cementite.…”

Section: Effects On the Microstructures And Fracture Morphologiesmentioning

confidence: 96%

“…Fracture toughness is used to characterize toughness. An impact test is used to obtain an indication of fracture toughness through measuring the resistance of a material to impact load without fracture, 15 which is a tool for evaluating the ductile-brittle transition temperature. In addition, hardness is also a very important parameter of a material as it is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion.…”

Section: Tempering Treatment and Performance Testsmentioning

confidence: 99%

Effect of tempering temperature on precipitate evolution and mechanical properties of 34CrNiMo6 steel

Ge¹,

Wang²

2019

Mater. Tehnol.

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The effect of the tempering temperature on mechanical properties are studied by investigating the precipitate evolution during the heat treatment of the 34CrNiMo6 steel. Five different tempering temperatures are used at the same holding time of 3 h. Then the mechanical properties of the 34CrNiMo6 steel are studied under steady-state conditions and impact conditions. The strength decreases while the elongation after breakage increases with the increasing tempering temperature. The impact-absorbing energy at 20°C and-40°C increases with the increasing tempering temperature. Based on the experimental results, the recommended tempering temperature is 660°C. The differences in mechanical properties related to different tempering temperatures may be caused by the nucleation rate and growth of precipitates under different conditions. The spherification degree of cementite is more complete with the recommended tempering temperature, resulting in a decrease in mechanical properties and improvement of ductility.

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“…Among the latter ones are relatively coarse carbides of M 23 C 6 -type that precipitated mainly along the lath/block/packed boundaries, and nanoscale MX-type carbides/nitrides that homogeneously distributed throughout the tempered martensite [1][2][3][4][5]. This microstructure provides high toughness at ambient temperatures and a low ductile-brittle transition temperature (DBTT) of about −60 • C [3,5,[7][8][9][10]. Moreover, these steels are characterized by a rather high impact toughness of approx.…”

Section: Introductionmentioning

confidence: 99%

On the Fracture Behavior of a Creep Resistant 10% Cr Steel with High Boron and Low Nitrogen Contents at Low Temperatures

et al. 2019

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An advanced, high chromium, creep-resistant steel was subjected to the tensile tests and three-point bending tests of Charpy V-notch specimens at temperatures of −196 to 20 °C. The steel exhibited ductile fracture under tension tests at all of the temperatures studied. The mechanical properties, i.e., strength and uniform elongation, were enhanced with a decrease in temperature down to −140 °C. Transgranular, dimpled fracture remained the primary fracture mechanism under tension. On the other hand, the results obtained with Charpy V-notch specimens suggested the ductile–brittle transition (DBT). Full embrittlement was observed at temperatures of −60 °C and −150 °C upon impact tests and three-point bending tests, respectively, when the unstable crack started to propagate without remarkable plastic deformation. The DBT temperature of −27 °C for the present steel corresponded to the 28 J impact transition temperature, T28J, when the maximum impact stress matched the maximal true tensile stress.

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Effect of normalization temperatures on ductile–brittle transition temperature of a modified 9Cr–1Mo steel

Cited by 68 publications

References 37 publications

Effect of Rare Earth Ce on the Microstructure and Mechanical Properties of 34CrNiMo6 Steel for Wind Turbine Main Shaft

Effect of Rare Earth Ce on the Microstructure and Mechanical Properties of 34CrNiMo6 Steel for Wind Turbine Main Shaft

Effect of tempering temperature on precipitate evolution and mechanical properties of 34CrNiMo6 steel

On the Fracture Behavior of a Creep Resistant 10% Cr Steel with High Boron and Low Nitrogen Contents at Low Temperatures

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