Effects of Pre-Strain on the Aging Behavior of Al 7075 Alloy for Hot-Stamping Capability
The present study investigates the significance of pre-strain on the T6 aging behavior of an Al 7075 alloy for evaluating the applicability of hot stamping. In practice, the alloy was pre-strained up to 15% during solution heat treatment at 480 °C prior to quenching, and artificial aging was conduct...
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MDPI AG
2018-02-01
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| Series: | Metals |
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| Online Access: | http://www.mdpi.com/2075-4701/8/2/137 |
| _version_ | 1818032080902160384 |
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| author | Seon-Ho Jung Jongsup Lee Megumi Kawasaki |
| author_facet | Seon-Ho Jung Jongsup Lee Megumi Kawasaki |
| author_sort | Seon-Ho Jung |
| collection | DOAJ |
| description | The present study investigates the significance of pre-strain on the T6 aging behavior of an Al 7075 alloy for evaluating the applicability of hot stamping. In practice, the alloy was pre-strained up to 15% during solution heat treatment at 480 °C prior to quenching, and artificial aging was conducted at 120 °C. The peak aging time and precipitation behavior were compared with the alloy with pre-straining at room temperature after quenching but immediately before the artificial aging. The results showed that increasing amounts of pre-strain tend to reduce the aging time up to 50% for achieving peak hardness, which is consistent with the alloy at the T6 condition. There is a limitation for the maximum attainable amount of pre-strain of 10% for the homogeneous distribution of strain when the alloy is strained at room temperature (RT) due to the low formability. The pre-strained alloy as hot stamping exhibited lowering of the peak reaction temperatures for dissolution and formation of Guinier–Preston (GP)-Zones and precipitated with increasing amounts of pre-strain towards 15% through the differential scanning calorimetry analysis, thereby confirming the shortening of the peak aging time. The present study confirms the excellent potential of the hot-stamping process to extend the capability of an Al 7075 alloy. |
| first_indexed | 2024-12-10T06:01:41Z |
| format | Article |
| id | doaj.art-68a0ba9f36b24424a6ca4158ea6bff0f |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-10T06:01:41Z |
| publishDate | 2018-02-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-68a0ba9f36b24424a6ca4158ea6bff0f2022-12-22T01:59:48ZengMDPI AGMetals2075-47012018-02-018213710.3390/met8020137met8020137Effects of Pre-Strain on the Aging Behavior of Al 7075 Alloy for Hot-Stamping CapabilitySeon-Ho Jung0Jongsup Lee1Megumi Kawasaki2Division of Materials Science and Engineering, Hanyang University, Seoul 04763, KoreaMetal Forming Technology R&D Group, Korea Institute of Industrial Technology, Incheon 21999, KoreaDivision of Materials Science and Engineering, Hanyang University, Seoul 04763, KoreaThe present study investigates the significance of pre-strain on the T6 aging behavior of an Al 7075 alloy for evaluating the applicability of hot stamping. In practice, the alloy was pre-strained up to 15% during solution heat treatment at 480 °C prior to quenching, and artificial aging was conducted at 120 °C. The peak aging time and precipitation behavior were compared with the alloy with pre-straining at room temperature after quenching but immediately before the artificial aging. The results showed that increasing amounts of pre-strain tend to reduce the aging time up to 50% for achieving peak hardness, which is consistent with the alloy at the T6 condition. There is a limitation for the maximum attainable amount of pre-strain of 10% for the homogeneous distribution of strain when the alloy is strained at room temperature (RT) due to the low formability. The pre-strained alloy as hot stamping exhibited lowering of the peak reaction temperatures for dissolution and formation of Guinier–Preston (GP)-Zones and precipitated with increasing amounts of pre-strain towards 15% through the differential scanning calorimetry analysis, thereby confirming the shortening of the peak aging time. The present study confirms the excellent potential of the hot-stamping process to extend the capability of an Al 7075 alloy.http://www.mdpi.com/2075-4701/8/2/137Al alloyartificial aginghot stampingprecipitationpre-strain |
| spellingShingle | Seon-Ho Jung Jongsup Lee Megumi Kawasaki Effects of Pre-Strain on the Aging Behavior of Al 7075 Alloy for Hot-Stamping Capability Metals Al alloy artificial aging hot stamping precipitation pre-strain |
| title | Effects of Pre-Strain on the Aging Behavior of Al 7075 Alloy for Hot-Stamping Capability |
| title_full | Effects of Pre-Strain on the Aging Behavior of Al 7075 Alloy for Hot-Stamping Capability |
| title_fullStr | Effects of Pre-Strain on the Aging Behavior of Al 7075 Alloy for Hot-Stamping Capability |
| title_full_unstemmed | Effects of Pre-Strain on the Aging Behavior of Al 7075 Alloy for Hot-Stamping Capability |
| title_short | Effects of Pre-Strain on the Aging Behavior of Al 7075 Alloy for Hot-Stamping Capability |
| title_sort | effects of pre strain on the aging behavior of al 7075 alloy for hot stamping capability |
| topic | Al alloy artificial aging hot stamping precipitation pre-strain |
| url | http://www.mdpi.com/2075-4701/8/2/137 |
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