Nanocrystalline structure and Mechanical Properties of Vapor Quenched Al-Zr-Fe Alloy Sheets Prepared by Electron-Beam Deposition

Sasaki, Hiroyuki; Kobayashi, N.; Kita, Kazuhiko; Nagahora, Junichi; Inoue, Akihisa

doi:10.2320/matertrans.44.1948

Cited by 10 publications

(3 citation statements)

References 7 publications

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“…However, precipitation of Al 5 FeSi occurs in the matrix in small volume fraction (see Figure 7(c)) which supports ductility. These results are in support of the findings of Sasaki et al [25] and Zajac et al [26] who explained that the Al 5 FeSi crystals when they are round and in small volume fraction support elongation.…”

Section: Discussionsupporting

confidence: 92%

Mechanical Characteristics of 6063 Aluminum-Steel Dust Composite

Adeosun

Akpan

Sekunowo

et al. 2012

ISRN Mechanical Engineering

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Studies on the effect of steel dust (EAF dust) addition on the mechanical properties of 6063 Aluminium alloy have been carried out. The cast composite samples contain steel dust from 2–20 wt% produced in sand mould. These cast samples were homogenized, cold rolled, and solution-treated. The solution treated samples were normalized in still air, some quenched in water while some were tempered after quenching. Tensile and hardness responses were determined in all these processed samples. The results obtained reveal that 10 wt% steel dust in aluminium 6063 improved the ultimate tensile strength to 111.09 MPa and a corresponding hardness of 51.2 HV. Microstructural analysis shows iron containing intermetallics which are well distributed in the matrix with its morphology depending on the heat treatment and deformation imposed on them. Tensile strength and hardness of the composites was also found to depend on the volume fraction of intermetallics in the matrix.

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Section: Discussionsupporting

confidence: 92%

Mechanical Characteristics of 6063 Aluminum-Steel Dust Composite

Adeosun

Akpan

Sekunowo

et al. 2012

ISRN Mechanical Engineering

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“…Similar high strength nanocrystalline alloy sheets were also produced for Al-Zr and Al-Fe-Zr sheets 53 . For instance, the Al 95.3 Zr 4.0 Fe 0.07 alloy sheet of 1 mm in thickness consists of fcc-Al supersaturated solid solution with fine grain sizes of 260 to 680 nm and exhibits a high elevated temperature strength of 800 MPa at room temperature, 536 MPa at 523 K and 434 MPa at 573 K, all of which are much higher than those for 7075-T6 (ESD) alloy.…”

Section: Vapor-deposited Al-based Alloysmentioning

confidence: 99%

“…By using a two-target electron-beam evaporation equipment, vapor-deposited Al-based alloy sheets in a form of 120 × 120 × 1 mm were formed in Al-TM (TM=Fe, Zr, Ni, Ti, Cr) systems [52][53][54] . For instance, the Al-Fe deposited sheets consist of fcc-Al solid solution saturated with Fe and the fcc-Al phase has a grain size of about 2 μm at about 1%Fe, about 200 nm at 1.3%Fe and about 20 to 40 nm at 2.6 and 3 at% Fe 52 .…”

Section: Vapor-deposited Al-based Alloysmentioning

confidence: 99%

Development and Applications of Highly Functional Al-based Materials by Use of Metastable Phases

et al. 2015

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In recent years, there has been a strong demand of developing advanced structural materials with functional properties such as high specific strength, high elevated temperature specific strength, high fatigue specific strength, low corrosion loss and low wear loss. This is because the practical uses of these functional structure materials are expected to cause the saving of material amount, reductions of material cost and energy during material production as well as the saving of consuming energy during practical uses. Besides, the light-weight materials with high corrosion resistance and high wear resistance are effective for the increase of endurance limit and the lightening of final products. Thus, the development of novel Al-based alloys having simultaneously the above-described functional properties is particularly important nowadays.As strengthening mechanisms for Al-based alloys, the following seven mechanisms are generally known 1 : solid solution, grain size refinement, work hardening, age hardening, precipitation, dispersion and defect-induced solute segregation. We have also noticed that the use of rapid quenching enables highly supercooled liquid solidification in conjunction with a high nucleation rate and low growth rate. By utilizing the high nucleation rate and low growth rate phenomenon, we have synthesized various kinds of metastable phases which change from nanocrystalline base structure to bulk glassy base structure through an amorphous base structure with increasing quenching effect (cooling rate). It is also known that the quenching effect is dominated by cooling rate from melt resulting from rapid solidification processes as well as by supercooling capacity of alloy liquid depending on alloy component and composition.When we focus on the strengthening caused by metastable phases, the effect is due to the combination of solid solution + ultra-high density of defects for amorphous phase and dispersion + grain size refinement + segregation for nanocrystalline phase. The amorphous plus nanocrystalline mixed phase alloys are expected to have simultaneously almost all the strengthening mechanisms. By utilizing the combined strengthening mechanisms of these metastable phases, we have tried to prepare novel Al-based alloys with the high tensile strength exceeding 1500 MPa at room temperature, high elevated temperature strength above 500 MPa at 573 K, high rotating beam fatigue strength above 400 MPa at 10 7 cycles, high elevated temperature fatigue strength above 100 MPa at 673 K after 10 6 cycles and high corrosion resistance below 20 mm/year in 0.25 M NaOH aqueous solution at 293 K. In addition, these Al-based alloys have been requested to exhibit a low wear loss, low coefficient of thermal expansion and low material density etc. This paper presents the review of the development achievements of metastable Al-based alloys obtained in our group on the basis of the above-described backgrounds and objectives. This paper reviews the features of alloy components, structure and mechanical properties, p...

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Coupled solute effects enable anomalous high-temperature strength and stability in nanotwinned Al alloys

Xie

Shang

et al. 2020

Acta Materialia

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Nanocrystalline structure and Mechanical Properties of Vapor Quenched Al-Zr-Fe Alloy Sheets Prepared by Electron-Beam Deposition

Cited by 10 publications

References 7 publications

Mechanical Characteristics of 6063 Aluminum-Steel Dust Composite

Mechanical Characteristics of 6063 Aluminum-Steel Dust Composite

Development and Applications of Highly Functional Al-based Materials by Use of Metastable Phases

Coupled solute effects enable anomalous high-temperature strength and stability in nanotwinned Al alloys

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