Microstructure and Fatigue Properties of AlZn6Mg0.8Zr Alloy Subjected to Low-Temperature Thermomechanical Processing

Kowalski, A.; Ozgowicz, W.; Grajcar, A.; Lech-Grega, M.; Kurek, Andrzej

doi:10.3390/met7100448

Cited by 10 publications

(11 citation statements)

References 25 publications

(16 reference statements)

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“…Integration of heat treatment and plastic deformation operations of aluminium alloys significantly improves their impact efficiency on the microstructure, especially in the case of conventional techniques including cold rolling, solution heat treatment, and ageing. Advantageous effects of improved mechanical properties and corrosion resistance of Al–Zn–Mg alloys are obtained as a result of synergetic interactions of strain hardening and precipitation hardening [ 10 , 11 , 12 , 13 ]. Cold deformation of supersaturated solid solution reduces its thermodynamic stability and accelerates ageing effects.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

et al. 2018

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The paper presents results of the investigations on the effect of low-temperature thermomechanical treatment (LTTT) on the microstructure of AlZn6Mg0.8Zr alloy (7000 series) and its mechanical properties as well as electrochemical and stress corrosion resistance. For comparison of the LTTT effect, the alloy was subjected to conventional precipitation hardening. Comparative studies were conducted in the fields of metallographic examinations and static tensile tests. It was found that mechanical properties after the LTTT were better in comparison to after conventional heat treatment (CHT). The tested alloy after low-temperature thermomechanical treatment with increasing plastic deformation shows decreased electrochemical corrosion resistance during potentiodynamic tests. The alloy after low-temperature thermomechanical treatment with deformation degree in the range of 10 to 30% is characterized by a high resistance to stress corrosion specified by the level of PSCC indices.

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Section: Introductionmentioning

confidence: 99%

Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

et al. 2018

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“…In the case of the 7003 alloy, the material for the tests was an industrial aluminium alloy of Al-Zn-Mg type in the form of a sheet with dimensions 400 × 200 × 20 mm [ 34 , 35 , 36 ]. Al-Zn-Mg alloys of the 7000 series show the highest strength potential among alloys for precipitation hardening.…”

Section: Methodsmentioning

confidence: 99%

“…The aluminium alloy group analyzed consists of six materials: 6082-T6 [ 31 ], 2017A-T4 [ 32 ], D-30 [ 33 ], and three types of Al-Zn-Mg type alloys in grade 7003 for plastic working after the low-temperature heat-plastic treatment [ 34 , 35 , 36 ]. The results were used to analyze the correctness of the proposed model of fatigue life estimation.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Prediction of Aluminum Alloys Considering Critical Plane Orientation under Complex Stress States

Kurek

2020

Materials

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This publication is intended to present a new way of estimating the fatigue life of various construction materials. Carpinteri’s proposal was modified by replacing the fatigue limits ratio with the value of the normal to shear stress ratio for a given number of cycles. In this study, the proposed criterion and calculation model was verified for the selected group of aluminium alloys. The purpose of the analysis of the experimental studies was to check the effectiveness of the proposed method of estimating fatigue life under the applied bending and torsional load conditions. The results of the fatigue calculations are presented in graphical form by means of diagrams showing the comparison of design and experimental strength. Before fatigue life was calculated, the critical plane orientation according to Carpinteri’s model and the proposed model were determined. After analyzing the results of the comparison of design and experimental durability, it can be stated that the proposed fatigue life estimation algorithm gives satisfactory results for multiaxial cyclic loads.

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“…This indicates a similar fatigue strength under the analyzed conditions of cyclically variable loads. A comparative analysis of the results with the research conducted in the previous work of the authors [14] indicates that the fatigue strength of the alloy, subjected to complex bending with torsion, takes intermediate values between separate impacts of the oscillatory bending and double-sided torsion. …”

Section: Fatigue Propertiesmentioning

confidence: 98%

“…Sporadically the results of fatigue bending, torsion, or tension with torsion have been also presented [14,15]. This work is focused on fractographic aspects of the fatigue of the AlZn6Mg0.8Zr alloy.…”

Section: Introductionmentioning

confidence: 99%

Microstructural and Fractographic Analysis of Plastically Deformed Al-Zn-Mg Alloy Subjected to Combined High-Cycle Bending-Torsion Fatigue

Kowalski

Ozgowicz

Jurczak

et al. 2018

Metals

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Abstract:The present manuscript aims to determine the effect of various deformation levels during low-temperature thermo-mechanical treatment (LTTT) on the microstructure and fatigue strength of Zr-microalloyed Al-Zn-Mg alloy. The fatigue strength of the alloy was studied in high-cycle bending-torsion tests. The determination of the influence of plastic deformation level during LTTT on the microstructure was based on transmission electron microscopy (TEM) observations. The analysis of fracture after the fatigue tests was performed based on fractographic images using scanning electron microscopy (SEM). It was found that the major factor affecting the microstructure of the alloy, and determining the nature of fatigue fracture, is the strain level applied during LTTT.

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Microstructure and Fatigue Properties of AlZn6Mg0.8Zr Alloy Subjected to Low-Temperature Thermomechanical Processing

Cited by 10 publications

References 25 publications

Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

Microstructure, Mechanical Properties, and Corrosion Resistance of Thermomechanically Processed AlZn6Mg0.8Zr Alloy

Fatigue Prediction of Aluminum Alloys Considering Critical Plane Orientation under Complex Stress States

Microstructural and Fractographic Analysis of Plastically Deformed Al-Zn-Mg Alloy Subjected to Combined High-Cycle Bending-Torsion Fatigue

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