Properties of the thermally stable Al95Cr3.1Fe1.1Ti0.8 alloy prepared by cold-compression at ultra-high pressure and by hot-extrusion

Vojtěch, Dalibor; Michalcová, Alena; Průša, Filip; Dám, Karel; Šedá, P.

doi:10.1016/j.matchar.2012.02.011

Cited by 23 publications

(18 citation statements)

References 19 publications

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“…Among various strategies, one of the most promising is the formation of non-periodic (amorphous, quasicrystalline) [1][2][3][4][5][6][7][8] and periodic strengthening phases [9] in the microstructure by casting at high (10 4 -10 7 K/s) and intermediate (10 2 -10 3 K/s) cooling rates. Casting at high cooling rates always requires additional processing routes to obtain bulk materials from rapidly solidified (RS) feedstock.…”

Section: Introductionmentioning

confidence: 99%

Formation of a quasicrystalline phase in Al–Mn base alloys cast at intermediate cooling rates

et al. 2017

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Al-rich 94Al-6Mn and 94Al-4Mn-2Fe alloys were suction-cast to evaluate the feasibility of obtaining bulk quasicrystal-strengthened Al-alloys at intermediate cooling rates alloyed with non-toxic, easily accessible and affordable additions. The influence of different cooling rates on the potential formation of a quasicrystalline phase was examined by means of scanning and transmission electron microscopy, X-ray diffraction and differential scanning calorimetry. Increased cooling rates in the thinnest castings entailed a change in sample phase composition. The highest cooling rates turned out to be insufficient to form an icosahedral quasicrystalline phase (I-phase) in the binary alloy. Instead, an orthorhombic approximant phase occurred (L-phase). The addition of Fe to the 94Al-6Mn binary alloy enhanced the formation of a quasicrystalline phase. At intermediate cooling rates of 10 2 -10 3 K/s, various metastable phases were formed, including decagonal and icosahedral quasicrystals and their approximants. Rods (1 mm in diameter) composed of I-phase particles embedded in Al matrix exhibited a hardness of 1.5 GPa, much higher than the 1.1 GPa of 94Al-6Mn.

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Section: Introductionmentioning

confidence: 99%

Formation of a quasicrystalline phase in Al–Mn base alloys cast at intermediate cooling rates

et al. 2017

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“…In contrast, the Al-12Si-1Cu-1Mg-1Ni casting alloy contains large grains and eutectic silicon particles [20]. Previous experiments [12] have shown the mechanical properties of an ultra-high pressure compressed alloy with similar composition. The yield strength of the cold compressed material was 547 MPa, which is slightly above the values measured for the hot compressed materials investigated in this study ( Table 1).…”

Section: Mechanical Propertiesmentioning

confidence: 97%

“…Recently reported experiments have shown that using pressures exceeding 1 GPa can produce compact bulk materials that are nearly pore-free [11]. Previous experiments investigated a similar Al-Cr-Fe-Ti alloy prepared by cold pressure compaction of a rapidly solidified powder, at an ultra-high pressure of 6 GPa [12]. The resultant material was compact, pore-free and exhibited good mechanical properties even at higher temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…The chemical composition of the alloy used in this experiment differs from those of commonly investigated materials based on the Al-Cr-Fe-Ti system [1][2][3][4][5][6][7][8][12][13][14][15][16]. The usually high-cost titanium content was lowered to approximately 1 wt% to reduce the cost of the alloy, but Ti remained present to some degree to retain its stabilizing effect on the quasi-crystalline phases in the structure.…”

Section: Introductionmentioning

confidence: 99%

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Powder metallurgy Al–6Cr–2Fe–1Ti alloy prepared by melt atomisation and hot ultra-high pressure compaction

Dám

Vojtěch

Průša

2013

Materials Science and Engineering: A

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“…Significant effort has been put into developing aluminum PM materials that can be used to expand the scope of automotive applications [13], such as Al–Zn–Mg–Cu [14], Al–Si [15], Al–TMS (transition metals) [16], Al–Cu–Mg [3], and Al–Ni–Mg– (Cu) [17]. The Al–Fe–Cr–Ti alloy contains transition metals, such as Cr, Fe, and Ti, which are slow to diffuse in solid aluminum and whose alloying elements exhibit low solid solubility in aluminum [18,19]. It is easy to cause segregation when producing this alloy with conventional die casting techniques.…”

Section: Introductionmentioning

confidence: 99%

Effects of Compaction Velocity on the Sinterability of Al-Fe-Cr-Ti PM Alloy

Yuan

Yin

et al. 2019

Materials

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In this research, the effects of the compaction velocity on the sinterability of the Al–Fe–Cr–Ti powder metallurgy (PM) alloy by high velocity compaction were investigated. The Al–Fe–Cr–Ti alloy powder was compacted with different velocities by high velocity compaction and then sintered under a flow of high pure (99.999 wt%) nitrogen gas. Results indicated that both the sintered density and mechanical properties increased with increasing compaction velocity. By increasing the compaction velocity, the shrinkage of the sintered samples decreased. A maximum sintered density of 2.85 gcm−3 (relative density is 98%) was obtained when the compaction velocity was 9.4 ms−1. The radial and axial shrinkage were controlled to less than 1% at a compaction velocity of 9.4 ms−1. At a compaction velocity of 9.4 ms−1, sintered compacts with an ultimate tensile strength of 222 MPa and a yield strength of 160 MPa were achieved. The maximum elongation was observed to be 2.6%. The enhanced tensile properties of the Al–Fe–Cr–Ti alloy were mainly due to particle boundary strengthening.

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Properties of the thermally stable Al95Cr3.1Fe1.1Ti0.8 alloy prepared by cold-compression at ultra-high pressure and by hot-extrusion

Cited by 23 publications

References 19 publications

Formation of a quasicrystalline phase in Al–Mn base alloys cast at intermediate cooling rates

Formation of a quasicrystalline phase in Al–Mn base alloys cast at intermediate cooling rates

Powder metallurgy Al–6Cr–2Fe–1Ti alloy prepared by melt atomisation and hot ultra-high pressure compaction

Effects of Compaction Velocity on the Sinterability of Al-Fe-Cr-Ti PM Alloy

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