Optimization of precipitate hardening parameters of 7075 aluminum alloy using response surface methodology

Yadav, AP; Padap, AK

doi:10.1177/09544062221082035

Cited by 3 publications

(1 citation statement)

References 41 publications

(62 reference statements)

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“…In earlier work 18 it has been shown that increased strength of aluminum alloy was attributed to age hardening phenomenon. It has been demonstrated that the combination of artificial and natural aging may lead to fuel economy.…”

Section: Introductionmentioning

confidence: 95%

Optimization of dry sliding wear parameters through RSM approach of fine-grained 7075 Al alloy developed by MAC

Yadav¹,

Padap²

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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This study examines the influence of multi-axial Compression (MAC) on the wear attributes of 7075 Al alloy and optimize the dry sliding wear parameters using the response surface methodology (RSM). Optical microscopy images were used to detect microstructural changes in the 7075 Al alloy after MAC processing. The Face Centered Central Composite Design (FCCD) method was made up of three factors, each with three levels. To investigate the impact of various factors and how they interact with one another on wear, surface plots, contour plots, and mean effects plots were developed. The coefficient of regression R2 was 0.9621, demonstrating the constructed model’s acceptable accuracy. After six passes, average grain size was observed to reduce by up to 2.3 µm. The alloy processed by MAC is harder and stronger than the zero MAC pass alloy. The mechanical properties of Al alloy enhance with increased MAC pass. In this study, the Vickers micro-hardness, X-ray diffraction analysis, optical microstructural, energy dispersive X-ray spectroscopy analysis (EDS), tensile test, and scanning electron microscopy (SEM) were performed on broken tensile specimens and worn surface of the wear pin.

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Section: Introductionmentioning

confidence: 95%

Optimization of dry sliding wear parameters through RSM approach of fine-grained 7075 Al alloy developed by MAC

Yadav¹,

Padap²

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Effects of multi-axial compression and double-step aging on the microstructure and mechanical properties of Al alloy 7075

Yadav,

Padap

2024

Proceedings of the Institution of Mechanical Engineers, Part E:

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This study investigates the combined effect of severe plastic deformation via multi-axial compression (MAC) and subsequent double-step aging on the microstructure and mechanical properties of annealed 7075 Al alloy. Three distinct processes were employed: (1) double-step aging on the annealed sample, (2) double-step aging on the six-MAC pass processed sample, and (3) double-step aging without solutionization on the six-MAC pass sample. Process (2) yielded the most significant improvements in mechanical properties. Compared to the annealed sample, the six-MAC pass, double-step aged sample exhibited an average ultimate tensile strength increase of 134% and an average Vickers micro-hardness (HV) increase of 209%. This superior performance is likely attributable to the synergistic effect of grain refinement induced by MAC and precipitate hardening achieved through double-step aging. A comprehensive analysis of microstructure evolution, mechanical properties, fractography, and the relationship between them was conducted for all three processes. This in-depth examination provided valuable insights into the mechanisms governing the observed property enhancements, particularly in process (2). Additionally, a variety of characterization techniques were employed to comprehensively evaluate the material's mechanical and microstructural characteristics.

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Research on Surface Integrity and Fatigue Properties in the Turning of TC17 Titanium Alloy Based on the Response Surface Method

Lai,

Wang,

Wang

et al. 2023

Materials

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Titanium alloy parts are more and more widely used in the field of aerospace. In order to improve the service life of titanium alloy parts, the response surface method was used to study surface residual stress and roughness under different turning parameters. In addition, a mathematical model was established through multiple linear regression to determine the relationship between surface integrity parameters and fatigue life. The test results indicate that the turning parameters have an effect on surface residual stress in the order of feed rate > depth of cut > cutting speed and on surface roughness in the order of feed rate > cutting speed > depth of cut. The analysis results of surface integrity show that the residual compressive stress on the surface has the greatest impact on fatigue life, followed by surface roughness. The fatigue life increases with the increase in residual compressive stress and decreases linearly with the increase in surface roughness. The feed rate has a significant impact on residual stress and surface roughness. Therefore, under the experimental conditions of this paper, the appropriate feed rate can be selected to ensure that the Ra < 2 μm and a large residual compressive stress is obtained.

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Optimization of precipitate hardening parameters of 7075 aluminum alloy using response surface methodology

Cited by 3 publications

References 41 publications

Optimization of dry sliding wear parameters through RSM approach of fine-grained 7075 Al alloy developed by MAC

Optimization of dry sliding wear parameters through RSM approach of fine-grained 7075 Al alloy developed by MAC

Effects of multi-axial compression and double-step aging on the microstructure and mechanical properties of Al alloy 7075

Research on Surface Integrity and Fatigue Properties in the Turning of TC17 Titanium Alloy Based on the Response Surface Method

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