Influence of Cutting Parameters on Residual Stresses Induced by Milling in Pressure Die-Cast Aluminum Alloy Components

2000 ◽  
Vol 123 (4) ◽  
pp. 547-551 ◽  
Author(s):  
T. Berruti ◽  
G. Ubertalli
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Cutting Speed ◽  
Depth Of Cut ◽  
Cast Aluminum Alloy ◽  
Feed Speed ◽  
Cast Aluminum ◽  
X Ray ◽  
Die Cast ◽  
Experimental Apparatus

Residual stress states, induced by milling in a die cast aluminum alloy component, have been determined by means of X-ray diffraction. Samples have been cut from an automotive engine sump, fabricated by pressure die-casting. The X-ray experimental apparatus has been calibrated by detecting stresses on a sample bent under imposed external deformations. Different samples (cut from the sump) have been tested after milling operations with each one characterized by different cutting speed, feed speed and depth of cut in order to evaluate their influence on the final residual stress state. Results have been analyzed taking into account surface morphologies after milling, as revealed by scanning electron microscopy.

scholarly journals Analysis of cutting forces during in-cut and out-cut milling of EN AC-AlSi10Mg cast aluminum alloy

Mechanik ◽  
2018 ◽  
Vol 91 (10) ◽  
pp. 871-873
Author(s):  
Józef Kuczmaszewski ◽  
Paweł Pieśko ◽  
Magdalena Zawada-Michałowska
Keyword(s):  
Aluminum Alloy ◽  
Cutting Force ◽  
Cutting Forces ◽  
High Speed ◽  
Cutting Speed ◽  
Depth Of Cut ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Technological Parameters ◽  
High Speed Cutting

The analysis of cutting forces during in-cut and out-cut milling of EN AC-AlSi10Mg cast aluminum alloy was presented. The research included measurement of the components of the total cutting force: Ff, Fp and Fc (Fx, Fy, Fz respectively) and determination of their amplitudes at a constant feed per tooth value and the adopted variable technological parameters, i.e.: depth of cut ap, milling width ae and cutting speed vc. Based on the obtained results, it was found that along with the increase in the depth of cut and the milling width, the values of selected components and their amplitudes increase for both in-cut and out-cut milling. During rise of cutting speed, it was observed that the components of the total cutting force increase to the speed vc = 450 m/min, then their values begin to decrease. This is related to the transition from conventional machining to the range of High Speed Cutting. It is important that higher values of cutting forces were noted in the case of out-cut milling instead of in-cut milling.

Research on the microstructure, fatigue and corrosion behavior of permanent mold and die cast aluminum alloy

2014 ◽  
Vol 55 ◽  
pp. 353-360 ◽  
Author(s):  
Zuqi Hu ◽  
Li Wan ◽  
Shulin Lü ◽  
Peng Zhu ◽  
Shusen Wu
Keyword(s):  
Aluminum Alloy ◽  
Corrosion Behavior ◽  
Cast Aluminum Alloy ◽  
Permanent Mold ◽  
Cast Aluminum ◽  
Die Cast

Effect of Milling Speed and Feed on Surface Residual Stress of 7050-T7451 Aluminum Alloy

2012 ◽  
Vol 499 ◽  
pp. 217-222 ◽  
Author(s):  
C. Li ◽  
Yi Wan ◽  
R.R. Zhang ◽  
Zhan Qiang Liu
Keyword(s):  
Residual Stress ◽  
Aluminum Alloy ◽  
Cutting Speed ◽  
Diffraction Method ◽  
Cutting Condition ◽  
Feed Speed ◽  
X Ray Diffraction ◽  
Surface Residual Stress ◽  
Orthogonal Direction ◽  
Machined Surface

The residual stress in the milling of 7050-T7451 aluminum alloy was measured using X-ray diffraction method in which Psi-oscillation, Phi-oscillation and peak fit were adopted. Cutting speed and feed are main variables which were considered in this study. The results show that compressive residual stresses are generated in surface for the down milling generally, which is mainly due to burnishing effect between the tools flank face and the machined surface. In feed and its orthogonal direction, the effect of cutting speed and feed speed on residual stress is similar. Therefore, required residual stress can be achieved by controlling the cutting condition such as cutting speed, feed speed etc.

The Role of Anodization in Naturally Cooled Heat Sinks for Power Electronic Devices

2020 ◽  
Vol 142 (5) ◽  
Author(s):  
Zhongchen Zhang ◽  
Michael Collins ◽  
Eric Lau ◽  
Chris Botting ◽  
Majid Bahrami
Keyword(s):  
Aluminum Alloy ◽  
Thermal Radiation ◽  
Electronic Devices ◽  
Heat Sinks ◽  
Al Alloy ◽  
Cast Aluminum Alloy ◽  
Power Electronic ◽  
Cast Aluminum ◽  
Die Cast ◽  
Alloy 6061

Abstract Effect of anodization on the thermal performance of naturally cooled heat sinks in power electronic devices made of die-cast aluminum alloy A380 and machined aluminum alloy 6061 was investigated experimentally and numerically. Various types of anodization were examined with different thickness of anodic aluminum oxide layer (AAO), pore size distributions, and surface coloring conditions. A customized natural convection and thermal radiation experimental chamber was built to measure the cooling capacity and heat sink temperatures. A 3D numerical model was also developed and validated against the collected data to provide more details into the contribution of the radiation heat transfer. The total emittance of the anodized samples was determined by a Fourier transform infrared reflectometer (FTIR) spectroscopy method. The results show a significant improvement in total hemispherical emissivity from 0.14 to 0.92 in anodized die-cast aluminum samples. This increase resulted in a considerable reduction in overall thermal resistance, up to 15%; where up to 41% of the total heat dissipation was contributed by thermal radiation. In spite of the rather distinguishable surface morphologies, the measurements suggested that thermal emissivity of the anodized die-cast Al A380 and Al alloy 6061 samples were in the same range.

Influence of Aging Temperatures and Times on Mechanical Properties of Vacuum High Pressure Die Cast Aluminum Alloy A356

2012 ◽  
Vol 445 ◽  
pp. 277-282 ◽  
Author(s):  
Xue Zhi Zhang ◽  
Kazi Ahmmed ◽  
Meng Wang ◽  
Henry Hu
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Thermal Treatment ◽  
Tensile Properties ◽  
Intermetallic Phase ◽  
Aged Alloy ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Die Cast ◽  
Wide Range

In this study a number of thermal treatment schemes over a wide range of temperatures between 120˚ to 350˚ C and times (30 120 minutes) have been experimented in an effort to understand the effect of thermal treatment on tensile properties of vacuum die cast modified aluminum alloy A356. The results show that, the morphology of eutectic silicon has a sound effect on the tensile properties of the tested alloy. The content of magnesium-based intermetallic phases, their morphology and distribution throughout the matrix affect the mechanical properties of the aged alloy as well. The reduction in the strengths of the alloy treated at 350°C for two hours should be at least attributed partly to the absence of the magnesium-based intermetallic phase. However the presence of sufficient amount of magnesium intermetallic phase had played important role in strengthening the alloy thermally treated at 200°C for 90 minutes.

Strain Field Identification for Cast Aluminum Alloy Using X-ray Computed Tomography

2016 ◽  
Vol 2016 (0) ◽  
pp. OS15-09
Author(s):  
Shun YOKOI ◽  
Gakuji NAGAI ◽  
Osamu KUWAZURU ◽  
Masakazu KOBAYASHI ◽  
Hiroyuki TODA
Keyword(s):  
Computed Tomography ◽  
Aluminum Alloy ◽  
Strain Field ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
X Ray ◽  
Field Identification ◽  
X Ray Computed
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