INFLUENCE OF AGING ON THE HARDENABILITY OF 7055 ALUMINUM ALLOY THICK PLATE

After different rolling conditions, four 7055 aluminum alloy samples with different precipitation sizes were measured by scanning electron microscope, transmission electron microscope and laser ultrasonic. The attenuation coefficients of ultrasound measured by laser ultrasonic were calculated in the time domain, frequency domain and wavelet denoising, respectively. The relationship between the precipitate size and attenuation coefficient was established. The results show that the attenuation of the ultrasonic wave is related to the size of the precipitated phase; this provides a new method for rapid non-destructive testing of the precipitation of aluminum alloys.

Download Full-text

RETRACTION: A Study on the Nucleation Mechanism of Nano-Scale Precipitates of 7055 Aluminum Alloy

NANO ◽

10.1142/s1793292018930013 ◽

2018 ◽

Vol 13 (07) ◽

pp. 1893001

Author(s):

Ping Zhang ◽

Youqiang Wang

Keyword(s):

Aluminum Alloy ◽

Nucleation Mechanism ◽

Nano Scale ◽

7055 Aluminum Alloy

Download Full-text

The Applications of Vibratory Stress Relief in High-Strength Aluminum Alloy Thick Plate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.430-432.881 ◽

2012 ◽

Vol 430-432 ◽

pp. 881-885

Author(s):

Cai Jun Gan ◽

Kai Liao

Keyword(s):

Aluminum Alloy ◽

Residual Stresses ◽

Dimensional Stability ◽

Strain Energy ◽

Thick Plate ◽

High Strength ◽

Stress Relief ◽

High Strength Aluminum Alloy ◽

Mechanical Stretching ◽

Stretching Process

The level and distribution of residual stresses have great impact on dimensional stability, while Vibratory Stress Relief (VSR) is an effective technology to relax or homogenize residual stresses. Experimental study on residual stresses distribution, residual strain energy and machining deformation of 7075 high-strength aluminum alloy thick plate under different aging process status shows that VSR can effectively decrease the amplitude and strain energy density, and enhance stability of dislocation structures and phase states in metal microscopic volume, then internal residual stresses are homogenized to enhance components’ anti-deformation capacity. In addition, the capability in maintaining dimensional stability from VSR is better than that from traditional mechanical stretching process

Download Full-text

Effect of Rotation Speed on Performance of Friction Stir Welded Spray-Formed 7055 Aluminum Alloy

The Physics of Metals and Metallography ◽

10.1134/s0031918x21130068 ◽

2021 ◽

Author(s):

Yumo Jiang ◽

Yong Zhao ◽

Zhixia Zhao ◽

Shengchong Ma ◽

Keng Yan

Keyword(s):

Aluminum Alloy ◽

Rotation Speed ◽

Friction Stir ◽

7055 Aluminum Alloy

Download Full-text

Microstructure and Mechanical Properties of Thick Plate Friction Stir Welds for 6082-T6 Aluminum Alloy

High Temperature Materials and Processes ◽

10.1515/htmp-2018-0074 ◽

2019 ◽

Vol 38 (2019) ◽

pp. 525-532 ◽

Cited By ~ 2

Author(s):

Zhimin Liang ◽

Xue Wang ◽

Congwei Cai ◽

Dianlong Wang

Keyword(s):

Aluminum Alloy ◽

Thick Plate ◽

Frictional Heating ◽

High Heat ◽

Tensile Fracture ◽

Alloy Plate ◽

Friction Stir ◽

Welding Joint ◽

High Heat Input ◽

Two Sides

Abstract6082-T6 aluminum alloy plate with thickness of 42mm was butt welded by friction stir welding (FSW) from two sides. The microstructures of the joints exhibited different grain sizes because of unequal frictional heating and plastic flow during FSW process. The transition from the heat affected zone (HAZ) to the nugget zone (NZ) in thermos-mechanical affected zone of advancing side (AS-TMAZ) was more sudden than thermos-mechanical affected zone of retreating side (RS-TMAZ). Kissing bond (KB) defect throughout the entire FSW joint was displayed both at the grain boundary and in the interior of the grain with semi-continuous bands. KB had no direct effect on tensile properties. Vickers hardness of the FSW joint was lower than the BM because its high heat input, dissolved and coarsened precipitates and little to the grain size after FSW. Hardness distribution of double-sided welding joint showed X-shaped area softening characteristics, that is to say the lowest hardness was the junction of two welding joint of NZ and the junction of TMAZ and HAZ. The tensile fracture position occurred in the lowest hardness region of the FSW joint, and it did not occur in the KB defect position.

Download Full-text