A differential scanning calorimetry study of the release of stored energy in an AlFe alloy

Lendvai, J.; Honyek, G.; Juhász, András; Kovács, I.

doi:10.1016/0036-9748(85)90288-1

Cited by 8 publications

(8 citation statements)

References 13 publications

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“…[15] The term Q is [11] 325 ≤ T ≤ 400 35.8 [11] 325 ≤ T ≤ 400 44 ‫ע‬ 4 [30] 400 ≤ T ≤ 500 *Sample condition. [15] The term Q is [11] 325 ≤ T ≤ 400 35.8 [11] 325 ≤ T ≤ 400 44 ‫ע‬ 4 [30] 400 ≤ T ≤ 500 *Sample condition.…”

Section: Apparent Activation Energymentioning

confidence: 99%

“…We associate each process with the precipitation of one stable phase and one metastable phase. Some of the results reported in the literature [1,10,11,14,29,30] are indicated in this table. This means that higher values of W i are associated with the metastable phase, while lower values are associated with the stable phase.…”

Section: Apparent Activation Energymentioning

confidence: 99%

“…The criterion for the identification of these phases is based on the fact that for a given T, the metastable phase always appears earlier than the stable one. The alloys used in these works were Al 0.04 wt pct Fe and Al 0.04 wt pct Fe 0.12 wt pct Si, [1] Al 0.5 wt pct Fe, [29,30] Al 0.38 wt pct Fe 0.18 wt pct Si, [14] and commercial 8011 alloy. The logarithmic variation of W i with 1/T for the samples studied is shown in Figure 10.…”

Section: Apparent Activation Energymentioning

confidence: 99%

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Characterization by thermoelectric power of a commercial aluminum-iron-silicon alloy (8011) during isothermal precipitation

Luiggi

1998

Metall Mater Trans A

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We have characterized a commercial 8011 (Al-Fe-Si) alloy by studying samples under different initial states of strain hardening and iron and silicon supersaturation using thermoelectric power as a measurement technique. Isothermal kinetics of precipitation are obtained in the temperature range between 225 ЊC and 600 ЊC. We determine the atom fraction precipitated for each microstructural condition, identifying the dominant alloying additions and evaluating the typical parameters of the precipitated phases, such as, for example, the apparent activation energy. Finally, we determine the time-temperature-transformation (TTT) diagrams. Our results prove that iron is the alloying addition that controls the precipitation kinetics of the 8011 alloy in the temperature range studied.

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Section: Apparent Activation Energymentioning

confidence: 99%

Section: Apparent Activation Energymentioning

confidence: 99%

Section: Apparent Activation Energymentioning

confidence: 99%

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Characterization by thermoelectric power of a commercial aluminum-iron-silicon alloy (8011) during isothermal precipitation

Luiggi

1998

Metall Mater Trans A

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“…Leach et al [11] first used the calorimetric method to measure the stored energy of deformed Au-Ag alloys. Since differential microcalorimeters were invented by Watson and O'Neill [12] , differential scanning calorimetry (DSC) has been developed and applied to measuring the stored energy of materials [11,[13][14][15] . In the DSC method, the deformed specimens are annealed [13] and the elastic strain energy caused by the dislocations accompanying plastic deformation is released as heat and measured during recovery and recrystallization [14] .…”

Section: Introductionmentioning

confidence: 99%

Stored Energy Evaluation for High Strength Dual-Phase Steels with Different Pre-annealing Conditions

Uusitalo

DeArdo

2020

Metall Mater Trans A

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The purpose of this study was to determine the stored energy of dual-phase (DP) steels after hot rolling, coiling and cold reduction using electron backscattered diffraction (EBSD) analysis.Three methods for stored energy evaluation were examined and compared: the sub-grain boundary, image quality (IQ) method and kernel average misorientation (KAM) methods. The results demonstrated that the sub-grain method, in which stored energy was calculated as a function of subgrain boundary misorientations and total sub-grain boundary length, can provide more accurate stored energy values, since cold work was responsible for forming numerous dislocation structures such as shear bands, cells and cell walls. As expected, the steels with the combination of a low coiling temperature of 580ºC and 60% cold reduction had the highest stored energy values.

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“…Essa detecção não é trivial, pois os valores de energia armazenada são muito pequenos, em torno de 0,4 J/g em alumínio [126] e em torno de 1,0 J/g em titânio altamente deformado (ECAP) [127]. Com o intuito de facilitar a detecção da recristalização em zircônio puro e na liga Zircaloy-4, foram produzidas limalhas de ambas as amostras, para produzir uma grande quantidade de defeitos cristalinos.…”

Section: Calorimetria Exploratória Diferencial -Dscunclassified

Encruamento, recristalização e textura cristalográfica de zircônio puro e da liga Zircaloy-4.

Zimmermann¹

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A differential scanning calorimetry study of the release of stored energy in an AlFe alloy

Cited by 8 publications

References 13 publications

Characterization by thermoelectric power of a commercial aluminum-iron-silicon alloy (8011) during isothermal precipitation

Characterization by thermoelectric power of a commercial aluminum-iron-silicon alloy (8011) during isothermal precipitation

Stored Energy Evaluation for High Strength Dual-Phase Steels with Different Pre-annealing Conditions

Encruamento, recristalização e textura cristalográfica de zircônio puro e da liga Zircaloy-4.

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