Lightweight materials for aircraft applications

Immarigeon, J.‐P.; Holt, Richard T.; Koul, A. K.; Zhao, L.; Wallace, W.E.; Beddoes, J.

doi:10.1016/1044-5803(95)00066-6

Cited by 364 publications

(129 citation statements)

References 31 publications

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“…For aluminum alloys, an upper ten-27 sile strength in the range of 550-600 MPa may be readily 28 achieved via age hardening, and usually does not exceed 29 700 MPa even when invoking other strengthening ap-30 proaches, such as Hall-Petch strengthening, solid solu-31 tion hardening, and dispersion strengthening [1]. The 32 theoretical shear strength for Al free of defects is esti-33 mated as around 1500 MPa [2].…”

mentioning

confidence: 99%

Crystallization behavior of a gas atomized Al85Ni10La5 amorphous alloy

Zhang

Witkin

Lavernia

2005

Journal of Non-Crystalline Solids

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mentioning

confidence: 99%

Crystallization behavior of a gas atomized Al85Ni10La5 amorphous alloy

Zhang

Witkin

Lavernia

2005

Journal of Non-Crystalline Solids

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“…For both fuel economy and emissions control, reducing the weight of car bodies has been a focused issue in the aerospace and automobile industry [1][2][3][4]. For weight reduction, the use of lightweight metals, including Al and Mg alloys, is the main consideration by automakers.…”

Section: Introductionmentioning

confidence: 99%

Effects of Pre-Strain on the Aging Behavior of Al 7075 Alloy for Hot-Stamping Capability

Jung

Lee

Kawasaki

2018

Metals

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Abstract: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.

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“…The hardening precipitates are up to 0.01 µm in size [27]. For 7000 series alloy, their strength is derived from the precipitation of coherent MgZn 2 phase in the grain interiors and noncoherent MgZn 2 along the grain boundaries [28]. However, for 7075-T6 with many precipitates, the strain hardening may be depend considerably on these precipitates in Al matrix.…”

Section: Discussionmentioning

confidence: 99%

Physical and Numerical Determination of Workability in Aluminium Alloys

Kováčová¹,

Kvačkaj²,

Kočiško³

et al. 2014

Acta Metall Slovaca

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To prevent any failure or fracture in materials during a forming process, the study of material workability is a crucial task. In this paper, the workability of two different aluminium alloys was described through Cockcroft -Latham ductile fracture criteria and forming limit diagrams. Moreover, the experiments have been carried out using compression tests and finite element methods and there was able to compare and verify the physical and numerical approaches. According to the results, there was found out that physical and numerical models are advantageous tools to describe the material workability during forming processes and the optimal data are obtained when both approaches are working together.

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Lightweight materials for aircraft applications

Cited by 364 publications

References 31 publications

Crystallization behavior of a gas atomized Al85Ni10La5 amorphous alloy

Crystallization behavior of a gas atomized Al85Ni10La5 amorphous alloy

Effects of Pre-Strain on the Aging Behavior of Al 7075 Alloy for Hot-Stamping Capability

Physical and Numerical Determination of Workability in Aluminium Alloys

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