Effect of ultrasonic power on microstructure and mechanical properties of AZ91 alloy
Ultrasonic vibration with different powers from 0 W to 700 W was applied during the solidification process of AZ91 alloy. The microstructures and mechanical properties of the treated AZ91 alloy were characterized. Without subject to ultrasonic vibration (0 W of ultrasonic power), the dendrites were...
Saved in:
Published in | Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 502; no. 1; pp. 2 - 5 |
---|---|
Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Kidlington
Elsevier B.V
25.02.2009
Elsevier |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Ultrasonic vibration with different powers from 0
W to 700
W was applied during the solidification process of AZ91 alloy. The microstructures and mechanical properties of the treated AZ91 alloy were characterized. Without subject to ultrasonic vibration (0
W of ultrasonic power), the dendrites were coarse and large. Globular grains were obtained in AZ91 alloy subject to high intensity ultrasonic vibration. The grain size was decreased gradually from 202
μm to 146
μm with increasing ultrasonic power. The mechanical properties of the treated alloy were also improved. The ultimate tensile strength was increased from 145
MPa to 195
MPa and elongation to fracture from 2.3% to 5.2% correspondingly with increasing ultrasonic power. The mechanism by which ultrasonic power affects the microstructure and mechanical properties of AZ91 alloy is discussed. |
---|---|
Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0921-5093 1873-4936 |
DOI: | 10.1016/j.msea.2008.12.005 |