Effect of cold rolling on the formation and distribution of nanoclusters during pre-aging in an Al–Mg–Si alloy

Serizawa, Akimi; Sato, Tatsuo; Miller, M.K.

doi:10.1016/j.msea.2012.10.070

Cited by 35 publications

(13 citation statements)

References 31 publications

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“…Coatings 2018, 8,22 3 of 11 pressure was also set to 0.6 MPa at 160 °C, 0.75 MPa at 170 °C, and 0.95 MPa at 180 °C. The steam coating process was conducted for 0.5-1 h. Once the required holding time had elapsed, the autoclave was allowed to cool naturally to room temperature, resulting in the formation of an anticorrosive film on the Al alloys.…”

Section: Steam Coatingmentioning

confidence: 99%

“…Coatings 2018, 8,22 9 of 11 shown in Table 3. The Ecorr and icorr values for the anticorrosive-film-coated Al-Mg-Si alloy were estimated to be −1.16 V vs. Ag/AgCl and 8.2 × 10 −8 A cm −2 , respectively.…”

Section: Evaluation Of Anticorrosive Film By Immersion Corrosion Testmentioning

confidence: 99%

“…Al-Mg-Si alloys are lightweight medium-strength heat-treatable Al alloys with an excellent combination of cost-effective engineering properties that makes them ideal for a wide range of applications, from the transportation [7,8] and building industries [9] to high-voltage power transmission [10]. Despite their outstanding advantages as structural materials, however, Al-Mg-Si alloys also have some disadvantages.…”

Section: Introductionmentioning

confidence: 99%

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Formation of Anticorrosive Film for Suppressing Pitting Corrosion on Al-Mg-Si Alloy by Steam Coating

et al. 2018

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Al alloys offer excellent physical and mechanical properties, such as a low density, high specific strength, and good ductility. However, their low corrosion resistance has restricted their application in corrosive environments. There is a need, therefore, for a novel coating technology that is capable of improving the corrosion resistance of Al alloys. In the present study, we examined a steam-based method of forming a corrosion-resistant film on Al alloys. Al-Mg-Si alloy was used as the substrate. The cleaned substrates were set in an autoclave with ultrapure water as the steam source and processed using different temperatures and holding times, resulting in the formation of anticorrosive films on the alloy. FE-SEM images of the film surfaces showed that plate-like nanocrystals were densely formed over the entire surface. XRD patterns indicated that the film was composed mainly of AlOOH crystals. The potentiodynamic polarization curves revealed that the corrosion current density of the film-coated substrates significantly decreased, and that the pitting corrosion was completely suppressed, indicating that the corrosion resistance of the Al-Mg-Si alloy was improved by the film formed by means of steam coating.

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Section: Steam Coatingmentioning

confidence: 99%

Section: Evaluation Of Anticorrosive Film By Immersion Corrosion Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Formation of Anticorrosive Film for Suppressing Pitting Corrosion on Al-Mg-Si Alloy by Steam Coating

et al. 2018

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“…In the case of 0.5%-5% pre-deformation, β" is dominant at peak hardness condition, and this level of pre-deformation accelerates formation of β" due to decreased activation energy [33][34][35][36]. This can be attributed to the fact that formation of atomic clusters transforming to β" is enhanced during natural aging due to the pre-deformation [37]. Investigation of ~1% pre-deformation is relevant in industrial practice where the predeformation is applied to straighten the workpiece, e.g.…”

Section: Introductionmentioning

confidence: 99%

The effects of quench rate and pre-deformation on precipitation hardening in Al–Mg–Si alloys with different Cu amounts

Saito

Marioara

Røyset

et al. 2014

Materials Science and Engineering: A

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The effects of quench rate after solution heat treatment in combination with 1% pre-deformation on precipitation hardening in three Al-Mg-Si alloys have been investigated by transmission electron microscopy and hardness measurements during an isothermal heat treatment. The alloys contain different Cu amounts (up to 0.1 wt%) and the same amounts of other solute elements. While a Cu amount below 0.01wt% does not affect precipitation hardening, an addition of 0.1wt% Cu increases hardness due to formation of a fine microstructure having a high number density of short precipitates. A double peak hardness evolution was observed during isothermal heat treatment. This effect was most pronounced for alloys with low quench rate, and less pronounced for alloys with 1% pre-deformation and 0.1wt% Cu addition. The low quench rate also led to wider precipitation free zones. This effect was also less pronounced by 1% predeformation and addition of 0.1wt% Cu.

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“…There is a negative effect that cluster (1) is formed when holding at room temperature after solution heat treatment, and this cluster has dif culty growing into the β phase during the subsequent aging heat treatment 13,14) . To control the negative effects, various improvements such as pre-strain 15) , modi cation of the alloy composition and the addition of elements 16,17) , and heat treatment 18) can be used. Vacancy clusters induced by high-speed impact compression can be regarded as a type of strain; therefore, these clusters affect the natural aging behavior and subsequent arti cial aging behavior of Al-Mg-Si alloys.…”

Section: Introductionmentioning

confidence: 99%

Effect of High-Speed Impact Compression on Natural Aging and Subsequent Artificial Aging of a 6061 Aluminum Alloy

et al. 2016

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The effect of high-speed impact compression on natural aging and subsequent arti cial aging of a 6061 aluminum alloy was investigated using Micro-Vickers hardness test, differential scanning calorimetry (DSC) analysis and transmission electron microscopy (TEM). The suppression of natural age-hardening was clearly seen in the alloy with high-speed impact compression. TEM observation showed that ne β precipitates was formed during arti cial aging even after high-speed impact compression and natural aging. Maximum hardness of the peak-aged alloys with high-speed compression was almost the same as that without natural aging, showing that negative effect of two step aging was almost overcome by high-speed impact compression.

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Effect of cold rolling on the formation and distribution of nanoclusters during pre-aging in an Al–Mg–Si alloy

Cited by 35 publications

References 31 publications

Formation of Anticorrosive Film for Suppressing Pitting Corrosion on Al-Mg-Si Alloy by Steam Coating

Formation of Anticorrosive Film for Suppressing Pitting Corrosion on Al-Mg-Si Alloy by Steam Coating

The effects of quench rate and pre-deformation on precipitation hardening in Al–Mg–Si alloys with different Cu amounts

Effect of High-Speed Impact Compression on Natural Aging and Subsequent Artificial Aging of a 6061 Aluminum Alloy

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