Effect of rare earth Ce addition on the microstructure and mechanical properties of an Al–Cu–Mg–Ag alloy

Xiao, D.H.; Wang, J.N.; Ding, Dongyan; Yang, Huadong

doi:10.1016/s0925-8388(02)01162-3

Cited by 163 publications

(63 citation statements)

References 16 publications

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“…Figure 2 illustrates Al-Cu-Ni phases with Chinese script type morphologies. The formations of these intermetallic compounds are expected in Al-Ni-Cu alloys and greatly reduce Cu content available in Al-matrix for its precipitation and consecutive hardening 16,17 . Figure 3 illustrates the dissolution of Al-Cu-Ni phases with Chinese script type morphology, Cu content in those phases is expected that decrease from that longer solution times ~7 h favor higher Cu dissolution.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Evolution of Microstructure in Al-Si-Cu System Modified with a Transition Element Addition and its Effect on Hardness

et al. 2016

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The effect of Ni 1-2 wt.% addition on the microstructure and hardness of the aged A319 alloy were studied. Characterization analyses by x-ray diffraction, optical microscopy and scanning electron microscopy suggest clearly that Ni addition forms Al-Ni-Cu-Fe, Al-Cu-Ni and Al-Ni intermetallic compounds that correlates well with equilibria conditions. Analyses by transmission electron microscopy show that aging heat treatment promotes microstructural changes in morphology, size, and spatial distribution of precipitates. Vickers micro-hardness test of Ni 1 and 2 wt.% specimens have a hardness increase from that of A319 alloy of ~6-8% with mean values of 140.98 and 142.93 HV, respectively.

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Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Evolution of Microstructure in Al-Si-Cu System Modified with a Transition Element Addition and its Effect on Hardness

et al. 2016

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“…5 Rare earths (REs), such as Ce and La, have been used extensively for microstructural refinement and creep resistance in steel, cast iron, and aluminum alloys. [6][7][8][9] Preliminary studies on RE-containing solders, such as Sn-0.7Cu, Sn-Zn, Sn-Ag-Cu, Sn-3.5Ag, and Au-Sn, show a discrepancy in reported microstructures and mechanical properties. [10][11][12][13][14][15][16][17][18] For example, a study on Sn-Ag-Cu alloys with 0.1 and 0.25 wt.%Ce and La additions 12 reported RE-containing intermetallics in the microstructure, while another showed no evidence of discrete intermetallics being formed.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical behavior of novel rare earth-containing Pb-Free solders

Dudek

Sidhu

Chawla

et al. 2006

Journal of Elec Materi

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Sn-rich solders have been shown to have superior mechanical properties when compared to the Pb-Sn system. Much work remains to be done in developing these materials for electronic packaging. In this paper, we report on the microstructure and mechanical properties of La-containing Sn-3.9Ag-0.7Cu alloys.The addition of small amounts of La (up to 0.5 wt.%) to Sn-Ag-Cu refined the microstructure by decreasing the length and spacing of the Sn dendrites and decreased the thickness of the Cu 6 Sn 5 intermetallic layer at the Cu/solder interface. As a result of the change in the microstructure, Sn-Ag-Cu alloys with La additions exhibited a small decrease in ultimate shear strength but significantly higher elongations compared with Sn-Ag-Cu. The influence of LaSn 3 intermetallics on microstructural refinement and damage evolution in these novel solders is discussed. Our results have profound implications for improving the mechanical shock resistance of Pb-free solders.

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“…One regarded the process of age hardening of such alloys and tended to improve material strength via precipitation of novel hardening intermetallics by introducing new alloying elements, such as RE, Zr, Sc, and Ag. [24][25][26][27][28][29][30][31][32] The other addressed the development of new metal processing techniques to refine the microstructure and thus improve the mechanical strength. Among these methods, severe plastic deformation (SPD) for producing ultrafine-grained materials (at relatively low cost) has gained increasing interest.…”

Section: Introductionmentioning

confidence: 99%

Influence of severe plastic deformations on secondary phase precipitation in a 6082 Al-Mg-Si alloy

Cabibbo

Evangelìsta

Vedani

2005

Metall Mater Trans A

104

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The role of severe plastic deformation on the second-phase stability in a 6082 Al-Mg-Si alloy was studied using differential scanning calorimetry (DSC) and transmission electron microscopy (TEM) techniques. The alloy was fully annealed prior to undergoing up to six equal channel angular pressing (ECAP) passes using route C. The Orowan strengthening mechanism was calculated on the basis of TEM inspections for the two hardening second-phase precipitates: Mg 2 Si and Si. The former had a major tendency to be cut and fragmented by dislocations, while in the latter, a dissolution process was induced by severe plastic deformation. Accordingly, the second-phase Si particles became progressively less effective with increasing deformation (i.e., additional ECAP passes). The increase in hardness with the ECAP passes was mostly due to the grain refining mechanism and to dislocation tangles within the newly formed grains. The expected, though if limited, contribution of second-phase hardening was prevalently accounted for by the Mg 2 Si particles.

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Effect of rare earth Ce addition on the microstructure and mechanical properties of an Al–Cu–Mg–Ag alloy

Cited by 163 publications

References 16 publications

Evolution of Microstructure in Al-Si-Cu System Modified with a Transition Element Addition and its Effect on Hardness

Evolution of Microstructure in Al-Si-Cu System Modified with a Transition Element Addition and its Effect on Hardness

Microstructure and mechanical behavior of novel rare earth-containing Pb-Free solders

Influence of severe plastic deformations on secondary phase precipitation in a 6082 Al-Mg-Si alloy

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