scholarly journals Influence of secondary dendrite arm spacing (SDAS) on the fatigue properties of different conventional automotive aluminum cast alloys

2019 ◽  
Vol 13 (48) ◽  
pp. 105-115 ◽  
Author(s):  
Sascha Gerbe ◽  
Ulrich Krupp ◽  
Wilhelm Michels
Keyword(s):  
Fatigue Properties ◽  
Secondary Dendrite Arm Spacing ◽  
Dendrite Arm Spacing ◽  
Aluminum Cast Alloys ◽  
Cast Alloys

scholarly journals Automatic Determination of Secondary Dendrite Arm Spacing in AlSi-Cast Microstructures

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2827
Author(s):  
Christian Gawert ◽  
Rüdiger Bähr
Keyword(s):  
Computation Time ◽  
Automatic Measurement ◽  
Secondary Dendrite Arm Spacing ◽  
Dendrite Arm Spacing ◽  
Aluminum Cast Alloys ◽  
Cast Alloys ◽  
The Individual ◽  
Good Agreement

A new procedure for the automatic measurement of the secondary dendrite arm spacing (SDAS) from microscopic images is presented. The individual primary and secondary dendrite arms are identified through suitable segmentation techniques and clustered in such a way that dendritic structures are obtained suitable for SDAS measurement. The algorithms are applied to two different hypoeutectic aluminum cast alloys, and the quality of the measurements obtained is assessed through a comparison to manually measured SDAS values. A good agreement between the automated measurements and the distribution of manual measurements is found for both cast structures considered. In addition, a decrease in computation time is observed which allows for an increase in measurement density that is used to characterize the microstructures.

Effects of Eutectic Si and Secondary Dendrite Arm Spacing on the Mechanical Properties of Al-Si-Cu Cast Alloys

2014 ◽  
Vol 52 (11) ◽  
pp. 923-929 ◽  
Author(s):  
SungKil Hong ◽  
Kyungmin Lee ◽  
Seweon Choi ◽  
Youngchan Kim ◽  
Changseok Kang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Secondary Dendrite Arm Spacing ◽  
Dendrite Arm Spacing ◽  
Eutectic Si ◽  
Cast Alloys

scholarly journals Effects of Au and Ge Additions on the Microstructures and Properties of Ag-1.5Cu-0.1Y Alloys

Materials ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 123
Author(s):  
Desheng Zhang ◽  
Qin Zhang ◽  
Sida Li ◽  
Hongying Yang
Keyword(s):  
Corrosion Resistance ◽  
Alloying Elements ◽  
Strongly Correlated ◽  
Experimental Basis ◽  
Secondary Dendrite Arm Spacing ◽  
Dendrite Arm Spacing ◽  
Better Than

The application of silver is seriously affected by its tendency to oxidize and corrode. Therefore, the addition of proper alloying elements to silver-based alloys to achieve better properties has become a hot topic at present. In this current study, the effects of the addition of the two elements Au and Ge on the microstructures and properties of Ag-1.5Cu-0.1Y alloys were investigated. The results showed that the microstructures were refined and the second dendrite was shortened in the Ag-1.5Cu-0.1Y alloys with the addition of Au and Ge. Adding Au enhanced the corrosion resistance of the Ag-1.5Cu-0.1Y alloys. Furthermore, the corrosion resistance of the Ag-1.5Cu-0.1Y alloys with the addition of both Ge and Au was better than that of the alloy samples with Au added alone. The best corrosion resistance of the Ag-1.5Cu-0.1Y alloys was achieved by adding 1.0 wt.% Au and 1.0 wt.% Ge. The microhardness was enhanced by the addition of Au and Ge, and was strongly correlated with the secondary dendrite arm spacing (λ2) of the Ag-1.5Cu-0.1Y alloys. In addition, the Au addition could improve the conductivity of the Ag-1.5Cu-0.1Y alloy; however, Ge had little effect on the conductivity of the alloy samples. This work provides an experimental basis for the design of better performing silver-based alloys.

Effect of metallurgical parameters on the drilling and tapping characteristics of aluminum cast alloys

2019 ◽  
Vol 105 (1-4) ◽  
pp. 1357-1370 ◽  
Author(s):  
H. Barakat ◽  
Y. Zedan ◽  
A. M. Samuel ◽  
H. W. Doty ◽  
S. Valtierra ◽  
...  
Keyword(s):  
Aluminum Cast Alloys ◽  
Cast Alloys

scholarly journals Predicting Secondary-Dendrite Arm Spacing of the Al-4.5wt%Cu Alloy During Unidirectional Solidification

2016 ◽  
Vol 20 (1) ◽  
pp. 68-75 ◽  
Author(s):  
Alexandre Furtado Ferreira ◽  
José Adilson de Castro ◽  
Leonardo de Olivé Ferreira
Keyword(s):  
Unidirectional Solidification ◽  
Secondary Dendrite Arm Spacing ◽  
Dendrite Arm Spacing ◽  
Cu Alloy
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