Formability and lubrication of a B-pillar in hot stamping with 6061 and 7075 aluminum alloy sheets

Liu, Yong; Zhu, Zece; Wang, Zijian; Zhu, Bin; Wang, Yilin; Zhang, Yisheng

doi:10.1016/j.proeng.2017.10.819

Cited by 55 publications

(32 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among a broad range of metallic materials, high strength aluminum alloys are promising candidates to meet the requirements of manufacturing lightweight parts with acceptable strength [2,3]. For example, high strength Al-Zn-Mg-Cu alloys have been extensively used not only in the aerospace industry but also in automobile and transport industries because of their outstanding properties [4][5][6][7]. These series of precipitation hardenable aluminum alloys exhibit high strength-to-weight ratios, excellent corrosion resistance, good fatigue properties, high fracture toughness and ductility [2,3,[8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Performance of Thermo-Mechanically Processed AA7075 Alloy at Elevated Temperatures—From Microstructure to Mechanical Properties

Sajadifar

Scharifi

Weidig

et al. 2020

Metals

View full text Add to dashboard Cite

This study focuses on the high temperature characteristics of thermo-mechanically processed AA7075 alloy. An integrated die forming process that combines solution heat treatment and hot forming at different temperatures was employed to process the AA7075 alloy. Low die temperature resulted in the fabrication of parts with higher strength, similar to that of T6 condition, while forming this alloy in the hot die led to the fabrication of more ductile parts. Isothermal uniaxial tensile tests in the temperature range of 200–400 °C and at strain rates ranging from 0.001–0.1 s−1 were performed on the as-received material, and on both the solution heat-treated and the thermo-mechanically processed parts to explore the impacts of deformation parameters on the mechanical behavior at elevated temperatures. Flow stress levels of AA7075 alloy in all processing states were shown to be strongly temperature- and strain-rate dependent. Results imply that thermo-mechanical parameters are very influential on the mechanical properties of the AA7075 alloy formed at elevated temperatures. Microstructural studies were conducted by utilizing optical microscopy and a scanning electron microscope to reveal the dominant softening mechanism and the level of grain growth at elevated temperatures.

show abstract

Section: Introductionmentioning

confidence: 99%

Performance of Thermo-Mechanically Processed AA7075 Alloy at Elevated Temperatures—From Microstructure to Mechanical Properties

Sajadifar

Scharifi

Weidig

et al. 2020

Metals

View full text Add to dashboard Cite

show abstract

“…After trimming precision level, forming detections were also carried out. From these observations, the B-pillar wrinkled badly and cracked or even broke into pieces in cold stamping with or without lubricants [17].…”

Section: Aluminum Alloy Behavior During Hot Formingmentioning

confidence: 99%

Aluminum Alloys Behavior during Forming

Ramulu¹

2020

Aluminium Alloys and Composites

View full text Add to dashboard Cite

Industrial revolution toward weight reduction and fuel efficiency of the automotive and aerospace vehicles is the major concern to replace heavy metals with light weight metals without affecting much strength. For this, aluminum alloys are the major contributors to those industries. Moreover, aluminum alloys are majorly categorized as 1xxx, 2xxx, 3xxx, 4xxx, 5xxx, 6xxx, 7xxx, and 8xxx based on major alloying elements. Among all, 2xxx, 5xxx, 6xxx, and 7xxx are having majority of applications in the abovementioned industries. For manufacturing any engineering deformable components, forming characteristics are must. Forming behavior of aluminum alloys has been evaluated through different processes including deep drawing, stretching, incremental forming, bending, hydro forming etc., under different process conditions (cold, warm, and hot conditions) and process parameters. Each process has its own process feasibility to evaluate the formability without any forming defects in products. The present chapter discusses a few important processes and their parameter effect on the aluminum alloys through the experimentations and simulation works.

show abstract

“…In recent years, high-strength aluminum alloys have become very popular in the automotive industry thanks to the significant advantages they offer, such as high specific strength, good weldability, corrosion resistance, and relatively good formability [ 1 , 2 ]. The use of aluminum alloy sheets for the car’s body structure can be enough to greatly reduce the weight and therefore the fuel consumption [ 3 ], especially in the case of high-strength aluminum alloys such as the 7000 series. However, their formability at room temperature is relatively low, which forces manufacturers to carry out the stamping processes under warm or even hot forming conditions.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Direct Electric Current on the Plastic Behavior of AA7075 Aluminum Alloy in Different States of Hardening

et al. 2020

View full text Add to dashboard Cite

Electrically-Assisted Forming (EAF) techniques are interesting and promising for the automotive industry. Electrically-assisted tensile tests were carried out on specimens of AA7075 aluminum alloy in different states of hardening, namely T6 (the as-received state) and the supersaturated solid solution state. All the tests were carried out in quasi-static conditions under the application of direct electric current (DC) in the range of 90 to 540 A. The experimental results showed that with a DC density of 10 A/mm2 the uniform strain and strain at fracture increased when the AA7075 was in the supersaturated solid solution state. A correlation between the mechanical results and microstructural features analysed through transmission electron microscopy was assessed. An explanation of the investigated phenomena based on the electron wind theory, heterogeneous microscale Joule heating and the Portevin–Le Chatelier (PLC) effect was finally proposed.

show abstract

Formability and lubrication of a B-pillar in hot stamping with 6061 and 7075 aluminum alloy sheets

Cited by 55 publications

References 6 publications

Performance of Thermo-Mechanically Processed AA7075 Alloy at Elevated Temperatures—From Microstructure to Mechanical Properties

Performance of Thermo-Mechanically Processed AA7075 Alloy at Elevated Temperatures—From Microstructure to Mechanical Properties

Aluminum Alloys Behavior during Forming

The Effect of Direct Electric Current on the Plastic Behavior of AA7075 Aluminum Alloy in Different States of Hardening

Contact Info

Product

Resources

About