Evaluation of Formability and Mechanical Characteristic for Hot Forming Quenching in Sheet Forming of Al6061 Alloy

Ko, Dae Hoon; Kim, Jae Hong; Park, Sungha; Ko, Dae-Cheol; Kim, Byung Min

doi:10.3795/ksme-a.2013.37.4.483

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…The advantage of this new forming process compared to room temperature forming for precipitation hardenable aluminum was described in a study by Ko et al showing lower springback in the resulting geometry without losses in mechanical strength compared to a T6-heat treated state [4]. The potential of this forming process for non-hardenable aluminum alloys was further reported by Bariani et al [5].…”

Section: Introductionmentioning

confidence: 89%

Functional Gradation in Precipitation Hardenable AA7075 Alloy by Differential Cooling Strategies

Scharifi

Roscher

Lotz

et al. 2021

KEM

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Inspired by steel forming strategies, this study focuses on the effect of differential cooling on mechanical properties and precipitation kinetics during hot stamping of high strength AA7075 alloy. For this aim, different forming strategies were performed using segmented and differentially heated forming tools to provide locally tailored microstructures. Upon processing, uniaxial tensile tests and hardness measurements were used to characterize the mechanical properties after the aging treatment. Microstructure investigations were conducted to examine the strengthening mechanisms using the electron channeling contrast imaging (ECCI) technique in a scanning electron microscope (SEM). Based on the obtained results, it can be deduced that the tool temperatures play a key role in influencing the mechanical properties. Lower tool temperatures result in higher material strength and higher tool temperatures in lower mechanical properties. By changing the cooling rate with the use of differently heated forming tools, the mechanical properties can be controlled. Microstructure investigations revealed the formation of very fine and homogeneously distributed particles at cooled zones, which were associated with elevated mechanical properties due to the suppression of second phase particle formation during cooling. In contrast, coarse particles were observed at lower cooling rates, explaining the lower material strength found in these zones.

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Section: Introductionmentioning

confidence: 89%

Functional Gradation in Precipitation Hardenable AA7075 Alloy by Differential Cooling Strategies

Scharifi

Roscher

Lotz

et al. 2021

KEM

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“…The process flow is a step of forming the welded patchwork blank by heating it in a furnace, followed by press forming. HFQ is a process of hot forming a plate heated to a solution treatment temperature quenching it by a cooling channel provided in the die, and simultaneously performing hot forming and quenching (12)(13).…”

Section: Introductionmentioning

confidence: 99%

Application of hot forming quenching on patchwork blank using two-stage refilled friction stir spot welding

Kim

et al. 2018

MATEC Web Conf.

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The purpose of this study is to apply Hot Forming Quenching (HFQ) on Patchwork Blank of AA6061 using Two-stage refilled Friction Stir Spot Welding (TFSSW). TFSSW is a developed joining method to improve joint strength of conventional Friction Stir Spot Welding (FSSW) and it consists of two stages. The first stage is a conventional FSSW process and second stage is a refilling process for refilling keyhole. The Design of Experiment (DOE) was used to optimize the TFSSW process parameters. A hat shape forming test was performed using a patchwork blank manufactured with the optimal process parameters to investigate validity of applying HFQ. Formed hat shape part was sequentially heat treated with artificial aging (T6) condition. The hardness of the weld zone was measured to confirm a drop of mechanical property in comparison with the conventional cold forming, which shows the validity of HFQ application to patchwork blank using TFSSW.

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Hot Sheet Metal Forming Strategies for High‐Strength Aluminum Alloys: A Review—Fundamentals and Applications

et al. 2023

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In the past decade, aluminum alloys have become important structural materials in the automotive industry, thanks to their low density, high strength, high fracture toughness, and good fatigue performance. However, an important limitation of aluminum alloys is their poor formability at room temperature; as a result, numerous studies have been conducted with the aim of developing forming techniques to overcome this and facilitate the forming of more complex‐shaped components. Following an overview on the metallurgical background of aluminum alloys, this article reviews recent developments in forming processes for aluminum alloys. The focus is on process variants at room temperature and at higher temperatures and on a new hot forming technique promising considerable improvements in formability. This review summarizes the influence of different process parameters on microstructures and mechanical properties. Particular emphasis is given to process design and to the underlying microstructural phenomena governing the strengthening mechanisms.

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Evaluation of Formability and Mechanical Characteristic for Hot Forming Quenching in Sheet Forming of Al6061 Alloy

Cited by 4 publications

References 15 publications

Functional Gradation in Precipitation Hardenable AA7075 Alloy by Differential Cooling Strategies

Functional Gradation in Precipitation Hardenable AA7075 Alloy by Differential Cooling Strategies

Application of hot forming quenching on patchwork blank using two-stage refilled friction stir spot welding

Hot Sheet Metal Forming Strategies for High‐Strength Aluminum Alloys: A Review—Fundamentals and Applications

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