On strain-induced dissolution of θ′ and θ particles in Al–Cu binary alloy during equal channel angular pressing

Liu, Zhiyi; Bai, Song; Zhou, Xuanwei; Gu, Yanxia

doi:10.1016/j.msea.2010.12.060

Cited by 75 publications

(33 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[61][62][63] However, at the temperatures and ECAP conditions considered in this study, no redissolution or reprecipitation, or even cracking of particles take place, as it has been shown in the TEM micrographs of Figures 6 and 7. The occurrence of precipitate fragmentation during ECAP was reported earlier for h¢ precipitates in an Al-Cu alloy, [61] b¢ precipitates in an Al-Mg-Si alloy, [64] and MgZn 2 precipitates in an Al-7050 alloy [27] with elongated morphologies.…”

Section: B Comparison With Pure Aluminummentioning

confidence: 56%

Influence of Processing Severity During Equal-Channel Angular Pressing on the Microstructure of an Al-Zn-Mg-Cu Alloy

Cepeda-Jiménez¹,

García-Infanta²,

Rauch

et al. 2012

Metall Mater Trans A

View full text Add to dashboard Cite

A commercial Al-Zn-Mg-Cu alloy, Al 7075, was overaged at 553 K (280°C) for 5 hours and processed by equal-channel angular pressing (ECAP) using route B C . Different temperatures and number of passes, which determine the processing severity, were considered. The processing severity has been estimated by the maximum stress (r Proc ) recorded during each ECAP pass. The higher the number of passes or the lower the processing temperature, i.e., the higher is the processing severity, the finer the (sub)grain size is obtained. A minimum ultrafine (sub)grain size of approximately 150 nm after three passes at 353 K (80°C) or eight passes at 403 K (130°C) was obtained. The microhardness exhibited an instant increase from 76 HV for the overaged initial state to 115 HV after only the first pass. The coarsened precipitates in the overaged alloy lead to larger structural refinement than in pure aluminum.

show abstract

Section: B Comparison With Pure Aluminummentioning

confidence: 56%

Influence of Processing Severity During Equal-Channel Angular Pressing on the Microstructure of an Al-Zn-Mg-Cu Alloy

Cepeda-Jiménez¹,

García-Infanta²,

Rauch

et al. 2012

Metall Mater Trans A

View full text Add to dashboard Cite

show abstract

“…The ingot was homogenized at 758 K for 24 h in air and then cut into rectangular prisms with dimensions of 10.0 Â 10.0 Â 15.0 mm 3 for MAC processing or into rods with diameters of 10.0 mm and lengths of 8.0 cm for use in HPT processing. Following an earlier procedure [21], these samples were solution treated at 813 K for 2 h and then quenched in cold water and subsequently aged at 693 K for 2 h [19].…”

Section: Experimental Materials and Proceduresmentioning

confidence: 99%

Using an Al–Cu binary alloy to compare processing by multi-axial compression and high-pressure torsion

Zhang

et al. 2013

Materials Science and Engineering: A

View full text Add to dashboard Cite

a b s t r a c tAn Al-4% Cu alloy was selected as a model material in order to compare two different procedures for imposing severe plastic deformation: multi-axial compression (MAC) and high-pressure torsion (HPT). In MAC a compressive strain is applied to prismatic samples in a sequential order along three orthogonal directions and the process is repeated to large numbers of passes in order to attain high strains. In HPT a thin disk is held between anvils and subjected to a high applied pressure and concurrent torsional straining. The results show that HPT is the optimum procedure for producing a homogeneous ultrafinegrained material. Specifically, HPT is preferable because it produces materials having a larger degree of homogeneity and the equilibrium grain sizes are smaller and the Vickers microhardness values are higher than when processing by MAC.

show abstract

“…These investigations have shown that pre-existing precipitates can be fragmented and partially dissolved (i.e. in Al-Cu [30][31][32][33], Al-Cu-Mg [34]), whilst solute atoms can be redistributed and segregated to grain boundaries/dislocations (e.g. in AA7075…”

Section: Introductionmentioning

confidence: 99%

Strengthening of an Al–Cu–Mg alloy processed by high-pressure torsion due to clusters, defects and defect–cluster complexes

Chen

Gao

Sha

et al. 2015

Materials Science and Engineering: A

View full text Add to dashboard Cite

A physically-based model is established to predict the strength of cluster strengthened ultrafine-grained ternary alloys processed by severe plastic deformation. The model incorporates strengthening due to dislocations, grain refinement, co-clusters (due to short range order and modulus strengthening) and solute segregation. The model is applied to predict strengthening in an Al-Cu-Mg alloy processed by high-pressure torsion (HPT). The microstructure was investigated using transmission electron microscopy (TEM), atom probe tomography (APT), and X-ray diffraction (XRD). Analysis of XRD line profile broadening shows that the dislocation density increases significantly due to severe plastic deformation, which contributes to the increase of strength. APT reveals the presence of nanoscale coclusters and defect-solute clustering. The concepts of the multiple local interaction energies between solutes and dislocations were used to quantitatively explain the strengthening 2 mechanisms. The model shows a good correspondence with measured microstructure data and measured strength.

show abstract

On strain-induced dissolution of θ′ and θ particles in Al–Cu binary alloy during equal channel angular pressing

Cited by 75 publications

References 28 publications

Influence of Processing Severity During Equal-Channel Angular Pressing on the Microstructure of an Al-Zn-Mg-Cu Alloy

Influence of Processing Severity During Equal-Channel Angular Pressing on the Microstructure of an Al-Zn-Mg-Cu Alloy

Using an Al–Cu binary alloy to compare processing by multi-axial compression and high-pressure torsion

Strengthening of an Al–Cu–Mg alloy processed by high-pressure torsion due to clusters, defects and defect–cluster complexes

Contact Info

Product

Resources

About