Calorimetric studies of 7000 series aluminum alloys: II. Comparison of 7075, 7050 and RX720 alloys

Adler, P. N.; DeIasi, Richard

doi:10.1007/bf02667404

Cited by 117 publications

(35 citation statements)

References 13 publications

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“…With increasing heating rate, all the reaction regions moved towards higher temperatures. Comparison with literature data [14][15][16] indicates that the low temperature endotherm is due to the G-P zones dissolution, the high temperature endotherm is due to the dissolution of the equilibrium hexagonal g phase, and the intermediate region includes the intermediate metastable phase g 0 and equilibrium phase g formations. However, there are some differences in the DSC curves between the two samples.…”

Section: Thermal Analysismentioning

confidence: 68%

Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing

Zhao¹,

Liao²,

Jin³

et al. 2004

Acta Materialia

869

264

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Section: Thermal Analysismentioning

confidence: 68%

Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing

Zhao¹,

Liao²,

Jin³

et al. 2004

Acta Materialia

869

264

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“…[12][13][14][15][16][17][18][19][20][21][22][23][24][25] However, there is still a great deal of uncertainty about the nature of the zones and clusters that …”

Section: Introductionmentioning

confidence: 99%

Differential scanning calorimetry and electron diffraction investigation on low-temperature aging in Al-Zn-Mg alloys

Jiang

Taftø

Noble

et al. 2000

Metall Mater Trans A

132

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Differential scanning calorimetry (DSC) has been combined with transmission electron microscopy (TEM) to investigate the low-temperature decomposition processes taking place in an Al-5 wt pct Zn-1 wt pct Mg alloy. It was confirmed that two types of GP zones, i.e., GP(I) (solute-rich clusters) and GP(II) (vacancy-rich clusters), formed independently during decomposition of the supersaturated solid solution. The GP(I) zones form at a relatively low aging temperature and dissolve when the aging temperature is increased. The GP(II) zones are stable over a wider range of temperatures. To investigate the nature of the zones in the Al-Zn-Mg alloy, differential scanning calorimetry and transmission electron microscopy have also been carried out on binary Al-Zn alloys containing 5 wt pct and 10 wt pct Zn. In these Al-Zn alloys, GP zones formed rapidly during quenching, and they gave rise to characteristic electron diffraction patterns identical to those from GP(II) in the Al-ZnMg alloy system, implying that GP(II) zones in Al-Zn-Mg alloys are very similar to the zones formed in binary Al-Zn alloys. Thus, it is likely that GP(II) zones in Al-Zn-Mg alloys are zinc-rich clusters. In the Al-5 wt pct Zn-1 wt pct Mg alloy, both GP(I) and GP(II) were found to transform to Ј and/ or particles during heating in the differential scanning calorimeter. The Ј was also observed to form after prolonged isothermal aging of the Al-Zn-Mg alloy at 75 ЊC or after short aging times at 125 ЊC.

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“…The aim of this great effort is to prove the potential advantages that calorimetry has over techniques (such as TEM) traditionally used for such purposes. Although most of the work has been performed on "laboratory alloys" [l-6, 9-12], lately a considerable number of studies have been done on commercial alloys [7,8,[13][14][15][16][17]. This is particularly true for alloys of the 7000 series (A1-Zn-Mg and AI-Zn-Mg-Cu) [7,[13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…In the last few years there has been a strong revival of the use of calorimetric techniques for microstructure characterization of aluminium alloys [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The aim of this great effort is to prove the potential advantages that calorimetry has over techniques (such as TEM) traditionally used for such purposes.…”

Section: Introductionmentioning

confidence: 99%

“…Although most of the work has been performed on "laboratory alloys" [l-6, 9-12], lately a considerable number of studies have been done on commercial alloys [7,8,[13][14][15][16][17]. This is particularly true for alloys of the 7000 series (A1-Zn-Mg and AI-Zn-Mg-Cu) [7,[13][14][15][16][17]. On the other hand, commercial alloys of the 2000 series (A1-Cu), having been intensively studied in their binary versions [1-6], have not received so much attention [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of the microstructure of a commercial Al-Cu alloy (2 0 1 1) by differential scanning calorimetry (DSC)

Cordovilla

Louis

1984

J Mater Sci

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In this work the microstructure of a commercial Al-Cu alloy (2 0 1 1 ) in several metallurgical states has been studied by means of differential scanning calorimetry (DSC). The metallurgical states were chosen in such a way that the alloy contained predominantly one of the four possible phases in these alloys (i.e. GP zones and 0", O' and 0 phases).The commercial tempers T3 and T6 have also been considered. The interpretation of the DSC curves was aided by measuring the changes in Vickers hardness and conductivity during a linear heating similar to that provided by the DSC apparatus; these studies allow, for instance, a clearer distinction between the GP (Guinier-Preston) zone dissolution peak and the 0" phase dissolution peak. The results are compared with those obtained by other authors.

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Calorimetric studies of 7000 series aluminum alloys: II. Comparison of 7075, 7050 and RX720 alloys

Cited by 117 publications

References 13 publications

Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing

Microstructures and mechanical properties of ultrafine grained 7075 Al alloy processed by ECAP and their evolutions during annealing

Differential scanning calorimetry and electron diffraction investigation on low-temperature aging in Al-Zn-Mg alloys

Characterization of the microstructure of a commercial Al-Cu alloy (2 0 1 1) by differential scanning calorimetry (DSC)

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