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Showing 1 to 20 of 54 for “"7075"”.
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Hot working of aluminum alloy 7075
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1986.
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Grain boundary precipitation in aluminum alloy 7075
… three approaches to heat treating aluminum alloy 7075 were explored in an attempt to increase the grain boundary precipitate spacing relative to that in commercially processed 7075-T651 plate. The first approach consisted of quenching from the solution treatment temperature directly to the aging …
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An investigation of residual stresses in simulated wing panels of 7075-T6 aluminum.
… stresses at notches in simulated wing panels of 7075-T6 aluminum and to establish the relationships between the local stresses, residual stresses, and the far-field or applied stress. The stress concentration factors were found to decrease with increased plastic deformation while the strain …
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Neural Network Fatigue Life Prediction in 7075-T6 Aluminum from Acoustic Emission Data
… during fatigue cycling of twenty-four notched 7075-T6 aluminum specimens using broad-band piezoelectric transducers. A Kohonen self organizing map was used to classify the AE flaw growth signals. The signals were classified into three categories based on their AE parameters: plastic …
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Practical Aspects of Assessing Nonlinear Ultrasonic Response of Cyclically Load 7075-T6 Aluminum
… nonlinear response of the cyclically load 7075-T6 aluminum is described in this thesis. In order to estimate the nonlinear relation of the ultrasonic waves due to material fatigue damage or degradation, the spectral analysis techniques such as the power spectrum, bispectrum, and bicoherence …
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Grain Boundary Character Distribution in the HAZ of Friction Stir-Processed Al 7075 T7
… affected zone (HAZ) of friction stir welded Al 7075 T7 shows diminished corrosion resistance properties when compared with the parent material. Corrosion attack in this region of the weld is primarily intergranular and is associated with the presence of precipitate free zones. Current TEM …
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Prediction of Fatigue Life in 7075-T6 Aluminum from Neural Network Analysis of Acoustic Emission Data
… a back-propagation neural network, AE data from 7075-T6 aluminum specimens were used to classify failure mechanisms and predict the number of fatigue cycles to failure. AE waveforms were captured from 40 notched tensile specimens during the low-cycle fatiguing process. A Kohonen self-organizing …
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The effect of laser shock peening and shot peening on the fatigue performance of aluminium alloy 7075
… peening (SP) on the fatigue properties of both 7075-T6 and 7075-T0 aluminium round bar test specimens were investigated and compared by means of cyclic 3-point bend fatigue testing. This investigation focused on the role that the peening induced microstructure, surface morphology and hardness …
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Assessing and Enhancing Seawater Corrosion Performance of Aluminum Alloy 7075 and 2024 Additive Repairs Produced by Cold Gas Dynamic Spray Deposition
… of cold sprayed (CS) aluminum alloys 2024 and 7075 in an immersed seawater environment, and improve understanding of CS processing-microstructure-corrosion property relationships. As a low temperature additive spray technique, CS has an attractive ability to deposit heat-sensitive alloys …
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Development and characterization of cerium oxide coatings deposited by spontaneous processes on metallic substrates
… deposit cerium oxide coatings on aluminum alloy 7075-T6 and copper foils for corrosion protection and as an electrical insulator, respectively"--Abstract, page iv.
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Quench rate and aging effects in aluminum-zinc-magnesium-copper aluminum alloys
… occurring in Al-Zn-Mg-Cu commercial alloys, 7075 and 7050. Techniques used included hardness, conductivity and a differential scanning calorimetry (DSC) to understand and quantify precipitation in commercial 7075 and 7050 aluminum alloys.</p> <p>The use of the Jominy End Quench test to …
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Experimental investigation of structure, composition and properties of novel metal-carbon covetic materials
… alloy-based covetics. Covetic materials of 7075 Al, 6061 Al and 10200 Cu alloys obtained from TM2 were tested. 7075 Al materials were warm rolled while the other two materials were as-cast and no heat treatment was done on any of the samples. The 7075 Al covetic materials had carbon contents …
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Corrosion And Wear Resistance Of Titanium- And Aluminum- Based Metal Matrix Composites Fabricated By Direct Metal Laser Deposition
… while aluminum composites were deposited onto AA 7075 and AA 5083 for Al1 and Al2, respectively. Microstructures of the MMCs were studied by optical and scanning electron microscopy. The hardness and reduced Young's modulus (Er) were assessed through depth-sensing instrumented nanoindentation. …
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A study of fretting fatigue in aircraft components
… observed in experimental work performed on Al 7075-T6 specimens. A three-dimensional finite element model of sphere-plane fretting contact is reviewed. This model has been used to model elastic and elastoplastic fretting contact. The evolution of tangential loads coincident with plastic flow …
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Origins of Embrittlement of an Al-Zn-Mg-Cu Alloy Post Additive Friction Stir Deposition
… In this work, an aerospace aluminum alloy 7075 is evaluated both in the as deposited and heat treated condition via age hardening studies and tensile testing. It is found that an embrittlement phenomena occurs that is sensitive to processing parameters and quench rate during heat treatment. …
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The effect of moisture exposure on pretreated aluminum alloys
Changes in pretreated 5182, 6061 and 7075 aluminum surfaces on exposure to moisture for short times was studied. The pretreatment used was the standard ASTM method for FPL etching of aluminum. The moisture treatment used was either immersion in water at 81° C or exposure to water vapor at 81° C. …
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