A study on fracture properties of multiphase microstructures of a CrMo steel

Salemi, A.; Abdollah-zadeh, A.; Mirzaei, Majid; Assadi, H.

doi:10.1016/j.msea.2008.02.043

Cited by 22 publications

(9 citation statements)

References 20 publications

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“…As mentioned by e.g. Haušild et al [12], experimental data in the transition region generally show scatter. Microstructure M showed a higher upper shelf energy (116 J) than microstructure P (100 J).…”

Section: General Behavior and Associated Fracture Mechanismsmentioning

confidence: 89%

“…After fracture at -60°C (Figs 7a, 7d), cleavage facets connected by tearing ridges were found together with many secondary cracks. Haušild et al [12] explained that secondary cracks were created after the passage of the main crack and cut the river ridges of the main crack. Increasing the test temperature up to -20°C increases the fraction of ductile ligaments (Figs 7b, 7e).…”

Section: General Behavior and Associated Fracture Mechanismsmentioning

confidence: 99%

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Identification of ductile to brittle transition temperature by using plane strain specimen in tensile test and correlation with instrumented Charpy impact test: experimental and numerical study

Tioguem¹,

Mazière²,

Tankoua³

et al. 2018

Mechanics & Industry

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This study addresses the correlation between the ductile-to-brittle transition temperature ranges of high strength 4140 steel obtained respectively from tensile tests under plane strain (PS) conditions and from conventional Charpy impact tests. Specimens were taken respectively at 25 mm (P) and at 55 mm (M) from skin of a cylindrical 90-mm-radius hot rolled bar water quenched from 875 °C, tempered at 600 °C and air cooled. P and M samples respectively showed a fully martensitic and a martensite-bainite microstructure. Fracture surface observations showed good agreement for physical fracture mechanisms (cleavage facet size, mixed ductile + brittle fracture in the transition region, ductile fracture at higher temperatures) between PS and Charpy, in particular sensitivity of upper bainite to cleavage fracture that reduces fracture energy in the lower self-energy on Charpy tests.

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Section: General Behavior and Associated Fracture Mechanismsmentioning

confidence: 89%

Section: General Behavior and Associated Fracture Mechanismsmentioning

confidence: 99%

Identification of ductile to brittle transition temperature by using plane strain specimen in tensile test and correlation with instrumented Charpy impact test: experimental and numerical study

Tioguem¹,

Mazière²,

Tankoua³

et al. 2018

Mechanics & Industry

View full text Add to dashboard Cite

show abstract

“…The microstructure was evaluated by standard metallographic procedures: grinding and subsequent polishing on the Struers DiaPro Nap-B 1 µm emulsion. The polished specimens were etched by 3% nital solution [19][20][21][22][23].…”

Section: Experiments Methodologymentioning

confidence: 99%

STRESS ANALYSIS IN CYLINDRICAL SPECIMENS MADE FROM 34CrMo4 USING DIC

Štamborská¹,

Losertová²,

Mareš³

et al. 2014

Acta Metall Slovaca

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The stress analysis using digital image correlation was carried out on cylindrical tensile specimens made from low carbon 34CrMo4 steel. The results obtained by conventional tensile test were compared with the results obtained by digital image correlation. The true stresses were evaluated from the compiled true stress-strain diagrams and compared with the engineering stresses. The average values of the yield stress and tensile strength reached of 945±15 MPa and 1039±5 MPa, respectively. Thus, parameters obtained from tensile test were plotted in the engineering diagrams that represent often starting diagrams for engineering practice. Based on results of digital image correlation the possibility of construction of the true stress-strain diagrams is discussed with regard to more exact values of stress for use in practice. The evaluation and compilation of the true stress-strain diagrams were carried out by means of image correlation software Vic 2D.

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“…So, the microstructure could be formed of martensite or transformed martensite. Although no susceptibility to tempering brittleness is manifested, this steel possesses welding difficulties and a tendency to chilling cracking after hot forming, initiated mainly by indentations and surface defects [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Comparative strain analysis of 34CrMo4 steel and Inconel 738LC

Štamborská¹,

Losertová²,

Konečná³

et al. 2021

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The comparative analysis of mechanical properties using a digital image correlation by Vic 2D software was performed for two types of high-strength materials. The strain analysis during tensile tests was carried out on the cylinder tensile specimens of 34CrMo4 steel and IN 738LC superalloy. Both materials showed similar strength but different ductility. While the 34CrMo4 steel showed typical necking of tensile specimens with ductile fracture surfaces, cracking of the IN 738LC became without necking, and the fracture morphology displayed mixed feature with ductile dimples or quasi-cleavage areas and cracked carbides. Microhardness measurements completed metallographic and fractographic studies of tensile samples.

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A study on fracture properties of multiphase microstructures of a CrMo steel

Cited by 22 publications

References 20 publications

Identification of ductile to brittle transition temperature by using plane strain specimen in tensile test and correlation with instrumented Charpy impact test: experimental and numerical study

Identification of ductile to brittle transition temperature by using plane strain specimen in tensile test and correlation with instrumented Charpy impact test: experimental and numerical study

STRESS ANALYSIS IN CYLINDRICAL SPECIMENS MADE FROM 34CrMo4 USING DIC

Comparative strain analysis of 34CrMo4 steel and Inconel 738LC

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