Investigation of nanostructured Al-10 wt.% Zr material prepared by ball milling for high temperature applications

Prosviryakov, A. S.; Щербачев, К. Д.; Tabachkova, N. Yu.

doi:10.1016/j.matchar.2016.11.028

Cited by 14 publications

(12 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The milling was processed for 5 min and stopped for 5 min to prevent overheating. The applied milling parameters provided a high efficiency of the milling process for Al-based alloys [69,[71][72][73][74]. Mechanical alloying was carried out in an argon atmosphere to prevent oxidation.…”

Section: Methodsmentioning

confidence: 99%

“…Zirconium was completely dissolved in Al, but the precipitation of the Al3Zr phase was not detected during the mechanical alloying of the studied alloy. It is notable that precipitation of Al3Zr does not occur in a milling time range of 8 to 20 h for binary Al-Zr alloys [71,73,99]. The L12-Al3Zr phase is formed in Al-25at%Zr alloy after high energy ball milling of elemental Al and Zr powders [100].…”

Section: Effect Of Mechanical Alloyingmentioning

confidence: 98%

“…For low-alloyed Al-Mn-Cu-Zr(Cr,Sc) alloys (4-7 wt% of the alloying elements) strengthened by Al 20 Cu 2 Mn 3 , icosahedral quasicrystalline and L1 2 precipitates, an ultimate tensile strength of ~600 MPa at room temperature [20,110] and a yield strength of 150 MPa at elevated temperature of 350 • C [105] are reported. Compressive strengths of 800 MPa at room temperature and 350 MPa at 300 • C are observed for hot-press sintered MA granules of Al-5at/10wt% Zr alloy [73]. Notably, the Zr-free Al-7.7Mn-3.1Cu (wt%) alloy processed by high-energy ball milling and hot-press sintering at 400 • C exhibits a yield strength of ~900 MPa at room temperature and ~220 MPa at 350 • C [109].…”

Section: Mechanical Properties Of the Alloy After Annealing And Hot-p...mentioning

confidence: 99%

“…Large concentrations of the lattice defects are conductive to high diffusivity, which increases the solubility of the alloying elements. The abnormally supersaturated solid solutions are formed during MA of Al-Mg [61,62], Al-V [63,64], Al-Fe [65,66], Al-Mn [67][68][69][70], and Al-Zr [71][72][73] alloys. The solubility of Zr and Mn is increased to ~8 at% [71] and ~3.1-3.5 at% [67,74], respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have demonstrated the high strength and heat resistance of bulk alloys produced by mechanical alloying of aluminum with several transition metals. High-energy ball milled and hot-press sintered Al-based alloys with 5 at% Fe [66] and 3 at% Zr [73] exhibit high compressive strengths of 800-1000 MPa at room temperature and 350-500 MPa at 300-350 • C. The increase in strength was achieved due to the nanograined structure and nanoscale precipitates, which provide Hall-Petch [94,95] and Orowan strengthening mechanisms, respectively.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

The Microstructure and Properties of Al–Mn–Cu–Zr Alloy after High-Energy Ball Milling and Hot-Press Sintering

Yakovtseva,

Mochugovskiy,

Prosviryakov

et al. 2024

Metals

Self Cite

View full text Add to dashboard Cite

In the present research an Al–7.7%Mn–4.9%Zr–3.2%Cu (wt%) alloy was processed by mechanical alloying (MA) followed by hot press sintering. The microstructure, phase composition, and mechanical properties of the MA granules and sintered samples were investigated. The dissolution of Mn, Zr, and Cu with further precipitation of the Al6Mn phase were observed during high-energy ball milling. In the alloy processed without stearic acid after milling for ~10 h, an Al-based solid solution with ~4.9 wt%Zr, ~3.2 wt%Cu and a ~5 wt%Mn with a grain size of ~16 nm and a microhardness of ~530 HV were observed. The addition of stearic acid facilitated Mn dissolution and precipitation of the Al6Mn phase during milling but led to the formation of the ZrH2 phase that decreased the Zr solute and the microhardness. Precipitation of the Al6Mn, L12–Al3Zr, and Al2Cu phases during annealing and sintering of the MA granules in the temperate range of 350–375 °C was observed, and an additional Al20Cu2Mn3 phase was precipitated at 400–450 °C. Hot-press sintering at 450 °C provided a low fraction of cavities of ~1.5%, the yield strength of 1100 MPa, ultimate compressive strength of 1200 MPa, strain at fracture of 0.5% at room temperature, the yield strength of 380 MPa, ultimate compressive strength of 440 MPa, and strain at fracture of 3.5% at 350 °C. The microstructural evolution during high-temperature deformation on the sample surface was studied and the differences in deformation behavior for the alloys sintered at different temperatures were discussed.

show abstract