The paint–bake response of three Al–Mg–Zn alloys

Balderach, Dustin C; Hamilton, Jennifer A.; Leung, Emma; Tejeda, M Cristina; Qiao, Jun; Taleff, Eric M.

doi:10.1016/s0921-5093(02)00158-2

Cited by 19 publications

(20 citation statements)

References 25 publications

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“…The well-known example is the formation of "Cottrell atmosphere" in low carbon steels and the most important/common one is "cluster hardening" due to solutes, especially Mg solute, in 5xxx and 6xxx aluminum alloys. "Cluster hardening" because of Mg solutes is reported in many past works [2,3,13,14] when studying the baking/aging response of the Al-Mg and/or Al-Mg-Si alloys. Thus, "cluster hardening" due to Mg-rich atmospheres can occur during baking/strain aging of present AA5052 without the formation of any precipitate.…”

Section: Strengthening Mechanismmentioning

confidence: 94%

“…Regarding the strengthening of 5xxx aluminum alloys by strain aging, there are also many investigations that some of them are pertaining to paint-baking or bake-hardening of Al-Mg alloys [2,3,8,[13][14][15][16][17][18]. It is interesting that even those Al-Mg alloys with the Mg content less than that of AA5052 are reported to be hardened by strain aging [2,3,13,17,18].…”

Section: Strain Aging Of 5xxx Aluminum Alloysmentioning

confidence: 99%

“…Therefore, the AA5052 with a moderate Mg content will give rise to good bake hardenability (without jeopardizing the impact resistance), better corrosion resistance and desirable formability. The other choice is however to add a ternary alloying element to Al-Mg alloys [14] though combined with a proper thermomechanical treatment.…”

Section: Strain Aging Of 5xxx Aluminum Alloysmentioning

confidence: 99%

“…Thus, stabilizing by conventional aging to reach H3 temper can be replaced by the stabilizing via the strain aging [8,14,19]. Dehghani et al [20][21][22][23][24][25] already discussed these issues regarding the bake hardenability of AA7075 and low carbon steels.…”

Section: Strain Aging Of 5xxx Aluminum Alloysmentioning

confidence: 99%

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Using response surface methodology to optimize the strain aging response of AA5052

Dehghani

Nekahi

Mirzaie

2010

Materials Science and Engineering: A

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Section: Strengthening Mechanismmentioning

confidence: 94%

Section: Strain Aging Of 5xxx Aluminum Alloysmentioning

confidence: 99%

Section: Strain Aging Of 5xxx Aluminum Alloysmentioning

confidence: 99%

Section: Strain Aging Of 5xxx Aluminum Alloysmentioning

confidence: 99%

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Using response surface methodology to optimize the strain aging response of AA5052

Dehghani

Nekahi

Mirzaie

2010

Materials Science and Engineering: A

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“…The temperatures and time for the two steps are interdependent and a good balance between precipitate density and size has to be obtained. A proper heat treatment can have a positive effect on the paint bake response through the formation of stable GP zones, which can act as nuclei for the formation of the main hardening phase " [8].…”

Section: Microstructural Evolutions In Aa6082 During Sht and Ageingmentioning

confidence: 99%

Investigation on fast and energy-efficient heat treatments of AA6082 in HFQ processes for automotive applications

Zheng

Zhang

et al. 2015

MATEC Web of Conferences

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Abstract. For HFQ volume production in automotive applications, short heat treatment time is an important factor for efficient and cost effective manufacturing. In this study, fast, efficient and energy saving solution heat treatment (SHT) and ageing processes have been identified based on precipitation nucleation and growth mechanisms and a series of experiments. Material chosen was AA6082, which is an alloy favoured for automotive body structures. The effects of heating rate, soaking temperature and time on SHT processes, and the influence on post mechanical properties, have been characterised. A duplex ageing process integrated paint bake process has been developed, with an optimum ageing condition determined. In addition, the effect of pre-deformation has been analysed.

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Corrosion and hardness properties of retrogression‐formed and warm‐formed AA7075 sheet

Ogunsanya

2023

Engineering Reports

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To achieve combined formability and strength in high‐strength precipitation‐hardened aluminum automotive sheets, different forming path used with fast and slow forming technology has been proposed. This study reports hardness and corrosion properties from two elevated‐temperature forming techniques, retrogression forming (RF) and warm forming (WF), employed on AA7075 alloy sheets. Parameters such as optimal pre‐aging, re‐aging, WF, and RF temperature and time were determined. In the retrogression‐formed (R‐F) sheets, initial retrogression treatment of peak‐aged (i.e., T6) temper resulted in significant loss of properties, but final re‐aging step recovered most. When traditional peak‐aging treatment was used to re‐age R‐F sheets, their T6 hardness and corrosion properties were restored to 95%–97% and 86%, respectively, while re‐aging R‐F sheets using industrial post‐forming paint‐bake treatment restored their T6 hardness and corrosion properties to 87%–92% and 78%–79%. In the warm‐formed (W‐F) sheets, increasing pre‐aging temperature and time resulted in increasing properties, and properties of the best W‐F samples matched the R‐F samples. In addition, shorter‐time forming did not significantly reduce properties of formed part, encouraging the use fast‐forming technology. Overall, these findings show that sheets subjected to RF and WF techniques can possess T6 properties in formed parts.

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The paint–bake response of three Al–Mg–Zn alloys

Cited by 19 publications

References 25 publications

Using response surface methodology to optimize the strain aging response of AA5052

Using response surface methodology to optimize the strain aging response of AA5052

Investigation on fast and energy-efficient heat treatments of AA6082 in HFQ processes for automotive applications

Corrosion and hardness properties of retrogression‐formed and warm‐formed AA7075 sheet

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