Title of article
Thermal Fatigue Resistance of Discontinuously Reinforced Cast Aluminum-Matrix Composites
Author/Authors
Sobczak، J. نويسنده , , Slawinski، Z. نويسنده , , Sobczak، N. نويسنده , , Darlak، P. نويسنده , , Asthana، R. نويسنده , , Rohatgi، P. نويسنده ,
Issue Information
دوماهنامه با شماره پیاپی سال 2002
Pages
-594
From page
595
To page
0
Abstract
The thermal fatigue resistance of AlSi alloys and discontinuously reinforced Al-matrix composites containing graphite, silicon carbide, and fly ash particulates, and short alumina (Saffil) fibers was characterized by measuring the total length of microcracks on gravity-cast and squeeze-cast test specimens as a function of number of thermal cycles (1000-5000 cycles, 270 K amplitude). In each thermal cycle, the test specimens were heated and stabilized in air at 375 °C, water quenched, and air stabilized. In all specimens, the total crack length on a specified region increased with increasing number of thermal cycles. Whereas among monolithic alloys, squeeze-cast AI-12SiCuNiMg alloy exhibited better resistance to thermal cracking than AI-25Si and AI-20SiNi alloys, among the composites, squeeze-cast Al-alumina and Al-fly ash composites exhibited the best thermal fatigue resistance. The theoretical estimates of the thermal fatigue resistance of these composites are consistent with the experimental observations.
Keywords
EWG , Neopentyl , Nitroalkanes , Oxygen , Sulfur Nucleophiles , Nitrobenzyl , sp2 Carbons , Cumyl , Photostimulated Reactions , Geminal Dihalides , sp3 Carbons , Heterocyclic Analogues , Carbanions , (alpha)Carbon , Cycloalkyl Halides , Radicals Intermediates , Trihalides , Regiochemistry , Alicyclic Aliphatic Substrates , stereochemistry , Triorganylstannyl , Aliphatic Substrates , Carbonylation , Nitrogen Nucleophiles , Phosphorus Nucleophiles
Journal title
Journal of Materials Engineering and Performance
Serial Year
2002
Journal title
Journal of Materials Engineering and Performance
Record number
60307
Link To Document