Residual mechanical properties of aluminum alloys AA5083-H116 and AA6061-T651 after fire

Summers, P.T.; Case, Scott W.; Lattimer, Brian Y.

doi:10.1016/j.engstruct.2014.06.033

Cited by 38 publications

(7 citation statements)

References 31 publications

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Section: Introductionmentioning

confidence: 99%

“…Various aspects of the high-temperature performance of this alloy have been investigated in previous studies [22][23][24][25][26][27][28][29]. Summers et al [22,23] studied post-fire residual mechanical properties of 5083-H116, 6082-T651, and 6082-T6 aluminum alloy extrusions. After exposing the alloys to elevated temperatures, tension tests and Vickers hardness measurements tests were performed to determine the mechanical response of the alloys and quantify the time and temperature-dependent behavior.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties of Strengthening 5083-H111 Aluminum Alloy Plates at Elevated Temperatures

2021

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The use of aluminum alloys for external strengthening of reinforced concrete (RC) beams has been capturing research interest. Exposure to harsh environmental conditions can severely impact the strengthening efficiency. This works aims to investigate the degradation in the mechanical properties of aluminum alloy AA 5083 plates when exposed to temperatures ranging from 25 to 300 °C. Quasi-static Isothermal tensile experiments were conducted at different temperatures. It was observed from the experimental results that the yield strength remained constant in the temperature range of 25–150 °C before starting to drop beyond 150 °C, with a total reduction of ≈ 40% at 300 °C. The elastic modulus was temperature sensitive with about 25% reduction at 200 °C before experiencing a significant and pronounced reduction at 300 °C. The percentage drops in stiffness and yield strength at 300 °C were 62.8% and 38%, respectively. In addition, the Mechanical Threshold Strength Model (MTS) parameters were established to capture the yield strength temperature dependence. Two analytical models were developed based on the experimental results. Both models can reasonably predict the elastic modulus and yield strength of AA 5083 plates as a function of temperature. It was concluded that AA plates should be properly insulated when used as externally bonded reinforcement to strengthen RC beams.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Strengthening 5083-H111 Aluminum Alloy Plates at Elevated Temperatures

2021

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“…It was found that the effect of temperature on microstructure differs greatly in low and high temperatures. Summers et al [39] conducted the experiments to examine the evolution of aluminium alloy residual mechanical properties in detail, focused on the governing effect of microstructure.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of post-fire mechanical properties of Q235 cold-formed steel

Ren

Dai

Huang

et al. 2020

Thin-Walled Structures

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Cold-formed steels have been commonly applied in construction. However, there is a lack of understanding on its post-fire mechanical properties. This paper presents an experimental investigation into the post-fire mechanical properties of cold-formed steels. The test specimens were cut from the flat portion and corners of cold-formed channel sections, which were exposed to temperatures ranging from ambient temperature to 800°C, and then cooled with water and air. The specimens are of grade Q235, and of thickness 1mm and 2mm. The stress-strain curves and mechanical properties of all specimens were obtained from tensile coupon tests. A comparison of mechanical properties between coupon samples cut from flat portion and corners is presented. Moreover, the evolution of microstructure and fracture morphology of specimens after being cooled by air and water were examined. Finally, predictive equations are proposed for evaluating the post-fire mechanical properties of Q235 cold-formed steel channel sections.

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“…At an elevated temperature of about 250⁰C to 350⁰C, the mechanical properties of aluminum alloys in fire designated zones are degraded, where its strength is reduced as a result of the re-crystallization by annealing [3]- [5]. High temperature exposure of components causes further strength reduction and precipitation growth [6]- [9].…”

Section: Introductionmentioning

confidence: 99%

Burn-Through Responses of Aero-Engine Nacelle using Fiber Metal Composites by ISO2685 Propane-Air Burner

Mohammed*,

Talib

2019

IJRTE

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The paper presents experimental investigation on the behavior and burn through responses of a flat plate composite of fiber-metal laminates composites of aluminum alloy 2024-T3 with carbon and natural fibers subjected to environmental conditions in fire designated zone of an aircraft engine exposed to fire. The main purpose of this study is to know the different burn through time responses of different forms of aluminum alloy with synthetic and natural fibers. The composites were designed and developed to improve the flame fire resistance in a fire designated zone of an aircraft engine in near future for prolonged burning through time that will at least withstand the fire flame for 15 minutes according to the ISO 2685 standard. The composites are fabricated by hand lay-up method in a mold of 300 mm x 300 mm and compressed by compression machine. Based on the obtained results, some of the composites are indicated to be fireproof while some others are fire resistant. It is shown that the carbon fiber reinforced aluminum alloy laminate with only aluminum at top and bottom (CF+AA) of the composites can resist more flame temperature than the carbon fiber reinforced aluminum alloy laminate with alternate layers of aluminum and carbon fiber (CARALL) with 7.86%, the sandwich of carbon fiber with flax with 18.2% and the sandwich of carbon fiber with kenaf with 23.43%. In conclusion, the study reveals that aluminum alloy 2024-T3 with carbon fiber and some types of natural fibers composites possess good properties of resisting high temperature of fire designated zone of an aircraft engine nacelle.

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Residual mechanical properties of aluminum alloys AA5083-H116 and AA6061-T651 after fire

Cited by 38 publications

References 31 publications

Mechanical Properties of Strengthening 5083-H111 Aluminum Alloy Plates at Elevated Temperatures

Mechanical Properties of Strengthening 5083-H111 Aluminum Alloy Plates at Elevated Temperatures

Experimental investigation of post-fire mechanical properties of Q235 cold-formed steel

Burn-Through Responses of Aero-Engine Nacelle using Fiber Metal Composites by ISO2685 Propane-Air Burner

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