The Effect of Random Spectrum on the Fatigue Life of Hybrid Metal Matrix Composites

2010 ◽  
Vol 118-120 ◽  
pp. 336-341
Author(s):  
Yi Qi Wang ◽  
Hyoun Kon Ku ◽  
Gi Beop Nam ◽  
Jung I. Song
Keyword(s):  
Fatigue Life ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Fatigue Crack Initiation ◽  
Summation Method ◽  
Al Alloy ◽  
Matrix Composites ◽  
Periodic Load ◽  
Hybrid Metal Matrix Composites ◽  
Base Matrix

This research makes comparisons of empirical fatigue-lives between AC8A Al alloy and the metal matrix composites (Al/Al2O3, Al/Al2O3/Al2O3p), and also includes comparisons of fatigue-lives between empirical fatigue-lives and estimated fatigue-lives from regular-periodic load testing, acoustic emission (AE) method to predict fatigue-crack initiation before visible in sight and SEM (Scanning Electron Microscope) photographs of each material. According to the test results of the notched specimen, the fatigue life of the hybrid metal matrix composites and the metal matrix composites, which are more brittle than the base matrix was shorter than that of the base matrix under both types of loads. In addition, the fatigue-life estimated from the damage summation method and that from experiments at random loads were fairly identical.

Mechanical and microstructural analysis of Al-Al2O3/B4C hybrid composites

2020 ◽  
Vol 234 (12) ◽  
pp. 1503-1514
Author(s):  
Pankaj K Gupta ◽  
MK Gupta
Keyword(s):  
Metal Matrix Composites ◽  
Impact Energy ◽  
Metal Matrix ◽  
Mechanical Performance ◽  
Hybrid Composites ◽  
Microstructural Analysis ◽  
Al Alloy ◽  
Hybridization Technique ◽  
Matrix Composites ◽  
Hybrid Metal Matrix Composites

The present work aims to enhance the mechanical performance of monolithic Al alloy and single reinforced metal matrix composite using a hybridization technique. The microparticles of alumina and boron carbide were reinforced into cast Al alloy (6061) in a systematic varying ratio (i.e.100/0, 75/25, 50/50, 25/75 and 0/100) to prepare the hybrid metal matrix composites via stir casting method. The mechanical properties (i.e. tensile, impact, hardness and flexural) of the prepared composites were investigated as per ASTM standards. Furthermore, microstructural analysis of unfractured and fractured composite samples was also carried out using Scanning Electron Microscope. It was observed that hybrid composites comprising of microparticles revealed an enhanced tensile, flexural and hardness properties, and reduced impact energy and porosity as compared to Al alloy and single reinforced metal matrix composites. The highest values of tensile strength and modulus were offered by a hybrid composite (B50A50), which was 40% and 52.12% higher than that of Al alloy. Furthermore, there was an improvement of 105.72% in flexural strength and a reduction of 23.88% in impact energy for composite B50A50 than that of Al alloy. The present developed hybrid metal matrix composites can be proposed to be used in automobile parts and construction applications.

Studies on mechanical properties of aluminum based hybrid metal matrix composites

2020 ◽  
Vol 33 ◽  
pp. 1144-1148
Author(s):  
B. Suresh Babu ◽  
P. Prathap ◽  
T. Balaji ◽  
D. Gowtham ◽  
S.D. Sree Adi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Composites ◽  
Hybrid Metal Matrix Composites
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