Characterization of Low-Symmetry Structures from  Phase Equilibrium of Fe-Al System—Microstructures and  Mechanical Properties

Matysik, Przemysław; Jóźwiak, Stanisław; Czujko, Tomasz

doi:10.3390/ma8030914

Cited by 79 publications

(31 citation statements)

References 55 publications

(89 reference statements)

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“…Considering the iron-aluminium binary phase diagram, Alrich intermetallic compounds such as FeAl 2 , Fe 2 Al 5 , and Fe 4 Al 13 were reported to exhibit complex crystal structures, poor ductility, and low fracture toughness and consequently a brittle mechanical behaviour at low temperatures [19,20]. Though, cracks, oriented at a 45 ∘ angle to the sliding direction in the wear track and that propagate into a perpendicular orientation to the sliding direction, indicate brittle fracture of the Al-Si coating due to high tangential stresses at the sliding interface.…”

Section: Behaviour Of Al-si Coated 22mnb5mentioning

confidence: 99%

High Temperature Friction and Wear Performance of PVD Coatings under Press Hardening Contact Conditions

Mozgovoy

Hardell

Prakash

2019

Advances in Tribology

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Press hardening is widely employed to produce automotive structural and safety components from advanced high-strength steels. This process depends on friction between the forming tools and the work piece. Wear of the forming tools affects the dimensional accuracy of produced components and reduces their service life. It is therefore desirable to reduce wear of forming tools for press hardening applications. One way to achieve this is by applying hard physical vapour deposited (PVD) coatings on the tool. In this work, the tribological behaviour of PVD coated tool-work piece material pairs has been studied at elevated temperatures in an experimental set-up simulating the tribological conditions in press hardening. Four different PVD coatings deposited on tool steel and uncoated tools as reference were studied during sliding against uncoated and Al-Si coated 22MnB5 steel. Results show that uncoated tools exhibited the lowest coefficient of friction when sliding against uncoated 22MnB5 steel. A CrWN coating initially showed low coefficient of friction but it increased with increasing sliding distance. A TiAlN coating and one of two AlCrN coatings showed similar frictional behaviour when sliding against uncoated 22MnB5 steel. During sliding against uncoated 22MnB5 steel, adhesive wear has been found to be the dominant wear mechanism. Adhesive wear was considerably reduced in the case of hard PVD coated tools in comparison to that of uncoated tools. During sliding against Al-Si coated 22MnB5 steel, no clear advantage in terms of friction behaviour of uncoated or PVD coated tools was observed. However, the transfer of Al-Si coating material from the work piece to the tools was significantly reduced for PVD coated tools. Frictional instabilities in all cases involving Al-Si coated work piece material further confirmed the occurrence of adhesive material transfer.

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Section: Behaviour Of Al-si Coated 22mnb5mentioning

confidence: 99%

High Temperature Friction and Wear Performance of PVD Coatings under Press Hardening Contact Conditions

Mozgovoy

Hardell

Prakash

2019

Advances in Tribology

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“…Particularly noteworthy are the intermetallic Fe 3 Albased alloys that could potentially substitute for more expensive superalloys and creep-resistant steels. They are characterized by a combination of interesting functional characteristics such as an excellent resistance to oxidation, sulfidation and carburizing, good resistance to corrosion in sea water, high resistance to wear, erosion, or cavitation, and high strength to weight ratio [2][3][4][5][6]. The Fe 3 Al phase, depending on the chemical composition and temperature has either a D0 3 or B2 ordered structure, which is derivative of the body-centered cubic BCC or A2 structure.…”

Section: Introductionmentioning

confidence: 99%

Multi-axial forging of Fe3Al-base intermetallic alloy and its mechanical properties

2016

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Tri-axial plane-strain forging was applied to the Fe-28Al-5Cr-0.8Zr-0.04B intermetallic alloy, in order to study its grain refinement and possible improvement in mechanical properties. The forging temperature range was from 20 to 600°C. The maximum number of forging passes was 67. The deformed microstructure was investigated using electron backscatter diffraction in a scanning electron microscope. At forging temperatures \500°C, the alloy was very prone to brittle cracking. At the temperature range of 500-600°C, the overall plasticity of material increased and the cracking tendency was reduced but not completely eliminated. Extensive processes of dynamic recovery/recrystallization were observed during forging at 600°C after 10-40 passes. Recrystallized areas with an average grain size of a few micrometers were observed. However, even after severe deformation at 600°C, resulting from 40 forging passes (e * 11.3), dynamic recrystallization was incomplete and the fraction of low-angle boundaries was still high. The Vickers microhardness substantially increased from 280 HV0.1 to 450 HV0.1 at the center of the sample after both deformations at room temperature as well as after 20-40 cycles at 500-600°C. However, a further increase of strain for a sample deformed at 600°C after 67 passes (e * 28) led to quite a significant hardness decrease at the center of the sample. This phenomenon could be associated with the initiation of dynamic recrystallization. None of the samples forged at the 500-600°C range exhibited any ductility improvement during subsequent tensile testing at room temperature, most likely, owing to the absence of a uniform ultrafine-grained structure developed during forging.

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“…On the other hand, it was confirmed that the IC layers had very high values of Vickers hardness of about 549-714 HV. In addition, the Al-Fe ICs had high Vickers hardness values: 892 ± 6 HV, FeAl 2 ; 903 ± 7 HV, Fe 2 Al 5 ; and 691 ± 5 HV, FeAl 3 [26]. In other words, these microhardness measurements presented the possibility of IC creation by reaction between Al and SUS.…”

Section: Resultsmentioning

confidence: 81%

Aluminum/Stainless Steel Clad Materials Fabricated via Spark Plasma Sintering

Park

Kim

et al. 2020

Materials

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Aluminum (Al)/stainless steel (SUS) clad materials were fabricated via the process of spark plasma sintering (SPS) using Al powder/bulk and an SUS sheet. Three Al/SUS clad types were fabricated: powder/bulk (P/B), bulk/bulk (B/B), and bulk/powder/bulk (B/P/B). During the SPS, Al and SUS reacted with each other, and intermetallic compounds were created in the clads. The thermal conductivity and thermal-expansion coefficient were measured using a laser flash analyzer and dynamic mechanical analyzer, respectively. The Al/SUS (P/B) clad had a thermal conductivity of 159.5 W/mK and coefficient of thermal expansion of 15.3 × 10−6/°C. To analyze the mechanical properties, Vickers hardness and three-point bending tests were conducted. The Al/SUS (P/B) clad had a flexural strength of about 204 MPa. The Al/SUS clads fabricated via SPS in this study are suitable for use in applications in various engineering fields requiring materials with high heat dissipation and high heat resistance.

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Characterization of Low-Symmetry Structures from Phase Equilibrium of Fe-Al System—Microstructures and Mechanical Properties

Cited by 79 publications

References 55 publications

High Temperature Friction and Wear Performance of PVD Coatings under Press Hardening Contact Conditions

High Temperature Friction and Wear Performance of PVD Coatings under Press Hardening Contact Conditions

Multi-axial forging of Fe3Al-base intermetallic alloy and its mechanical properties

Aluminum/Stainless Steel Clad Materials Fabricated via Spark Plasma Sintering

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