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

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

Numerical Analysis of Residual Stresses in Quenched High-Strength Aluminum Alloy Ultra-Thick Plates and their Reduction through Single-Side Cold Compression Method

2014 ◽  
Vol 887-888 ◽  
pp. 400-406
Author(s):  
Jia Chen Liu ◽  
Jin Liang Wang ◽  
Hui Qin Chen
Keyword(s):  
Aluminum Alloy ◽  
Residual Stresses ◽  
Thick Plate ◽  
High Strength ◽  
Tension Stress ◽  
Compression Method ◽  
Thick Plates ◽  
High Strength Aluminum Alloy ◽  
Cold Compression ◽  
Single Side

Residual stresses developed after quenching of high-strength aluminum alloy ultra-thick plates have an important effect on the quality and reliability of parts, and should be reduction to meet the requirement. In this investigation, numerical techniques of SIMUFACT software are used to simulate residual stresses in quenched 340mm×127mm×124mm Al-Zn-Mg-Cu high-strength aluminum alloy ultra-thick plate, and the results have been verified. On the basis of verified simulation parameters, residual stresses in quenched 4000mm×720mm×285mm ultra-thick plate and their reduction through single-side cold compression method were simulated by SIMUFACT software. After quenching, the value of maximum tension stress located at the interior center of the plate is 200MPa, and the value of maximum compression stress located on the surface of the plate is-169MPa. Through analysis of single-side cold compression processes, it can be concluded that more than 90% quenching residual stresses can be reduced by 1% upsetting ratio and 75% feed of the top die. Residual stresses after compression can be reduced down to the range of-25~9MPa. Mean residual stress values of simulation after compression are identical to the XRD testing data.

Residual stresses in parts of high-strength aluminum alloy V93 after different treatments

1980 ◽  
Vol 12 (8) ◽  
pp. 997-999
Author(s):  
S. I. Ivanov ◽  
V. F. Pavlov ◽  
V. I. Zmievskii ◽  
A. V. Mozhaev ◽  
L. G. Shumilov
Keyword(s):  
Aluminum Alloy ◽  
Residual Stresses ◽  
High Strength ◽  
High Strength Aluminum Alloy

Investigation on Residual Stresses in Pre-Stretching Process of Aluminum Alloy Thick Plate Based on Material Non-Uniformity

2016 ◽  
Vol 693 ◽  
pp. 821-829
Author(s):  
Feng Lin ◽  
Hua Min Wang ◽  
Guo Hua Qin ◽  
Dun Wen Zuo
Keyword(s):  
Aluminum Alloy ◽  
Yield Strength ◽  
Residual Stresses ◽  
Thick Plate ◽  
Elasticity Modulus ◽  
Equivalent Plastic Strain ◽  
7075 Aluminum Alloy ◽  
Stretching Ratio ◽  
Stretching Process ◽  
Good Agreement

A discretization method is used in pre-stretching simulation to separate an aluminum alloy thick plate into layers. When the equivalent plastic strain in each layer is defined according to the residual stresses during quenching, the yield strength model can be developed to estimate its yield strength. Again, the curve of elasticity modulus is fitted in the light of the experimental data, which can reveal how the elasticity modulus changes with plastic deformation. Finally, in consideration of the non-uniformity of yield strength and elasticity modulus, the pre-stretching of the quenched 7075 aluminum alloy thick plate is taken as an example to numerically simulate the value and distribution of residual stresses at the pre-stretching ratio of 1.8%, 2.2% and 2.5%, respectively. It is known from the simulated results that, by using the proposed method in this paper, the obtained results of the distribution and magnitude of the residual stresses are in good agreement with the experimental measurements.

IMPALCO 770

Alloy Digest ◽  
1962 ◽  
Vol 11 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
Aluminum Alloy ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
High Strength Aluminum Alloy ◽  
Structural Parts

Abstract IMPALCO 770 is a heat treatable, high strength aluminum alloy available in bar form for machining applications. It is recommended for highly stressed structural parts. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Al-120. Producer or source: Imperial Aluminium Company Ltd.

REYNOLDS R-301

Alloy Digest ◽  
1954 ◽  
Vol 3 (5) ◽  
Keyword(s):  
Composite Material ◽  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Corrosion Resistant ◽  
Bearing Strength ◽  
High Strength Aluminum Alloy

Abstract Reynolds R301 is a composite material, constituted of a core of high strength aluminum alloy, clad with a corrosion-resistant aluminum alloy. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and compressive, shear, and bearing strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: Al-16. Producer or source: Reynolds Metals Company.

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