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Microstructure and low-temperature plastic deformation of Al–Li alloy
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10.1063/1.3678178
/content/aip/journal/ltp/38/1/10.1063/1.3678178
http://aip.metastore.ingenta.com/content/aip/journal/ltp/38/1/10.1063/1.3678178

Figures

Image of FIG. 1.
FIG. 1.

Microphotographs of the surface of Al–3.8 at. % Li alloy after IPD by hydroextrusion via schemes C1 (a) and C3 (b) (the direction of extrusion is indicated by an arrow).

Image of FIG. 2.
FIG. 2.

Microphotographs of grains in Al–3.8 at. % Li alloy after combination hydroextrusion via scheme S4: transmission microscopy (a) and scanning microscopy (b).

Image of FIG. 3.
FIG. 3.

“True stress σ- true strain ɛ” curves of IPD Al–Li: samples C1 (a), C2 (b), C3 (c), and C4 (d). The dashed curves correspond to the initial annealed alloy C0 (Ref. 12).

Image of FIG. 4.
FIG. 4.

Nominal yield point σ0.2 (a), maximum stress σm (b), and uniform plastic deformation en (c) of microcrystalline Al–Li after hydroextrusion: C1 (○), C2 (▿), C3 (Δ), C4 (□), and C0 (Ref. 12).

Image of FIG. 5.
FIG. 5.

Strain hardening coefficient θ of microcrystalline Al–Li as a function of reduced flow stress (σ–σ0.2) at temperatures of 77 and 350 K (a), 4.2 K (b). The C0 curves are from Ref. 12.

Image of FIG. 6.
FIG. 6.

Activation volume V/b 3 as a function of reduced flow stress (σ–σ0.2) for microcrystalline Al–Li: (a) C1 (○) and C3 (Δ) at 155 K and C3 (▴) at 350 K; (b) C1 (○) and C3 (Δ) at 77 K and C3 (▴) at 4.2 K. The dashed curves are for coarse-grained samples, C0, with data from Refs. 12 and 13.

Tables

Generic image for table
Table I.

Characteristics of the sample ingots.

Generic image for table
Table II.

X-ray structural characteristics.

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/content/aip/journal/ltp/38/1/10.1063/1.3678178
2012-02-02
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Microstructure and low-temperature plastic deformation of Al–Li alloy
http://aip.metastore.ingenta.com/content/aip/journal/ltp/38/1/10.1063/1.3678178
10.1063/1.3678178
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