Open Access. Powered by Scholars. Published by Universities.®
- Publication
- Publication Type
Articles 1 - 2 of 2
Full-Text Articles in Metallurgy
Fatigue, Fracture, And Environmentally-Assisted Behavior Of Advanced Engineering Materials, Zhi Tang
Fatigue, Fracture, And Environmentally-Assisted Behavior Of Advanced Engineering Materials, Zhi Tang
Doctoral Dissertations
The objective of the present study is to provide a fundamental understanding of fatigue, fracture, and environmentally-assisted behavior of high-entropy alloys (HEAs). The work involves fatigue, fracture, and environmentally-assisted behavior of a new kind of advanced engineering materials, called HEAs. Three tasks are studied: (1) microstructures and fracture mechanisms of HEAs, (2) fatigue failure and life prediction of HEAs, and (3) corrosion and environmentally-assisted behavior of HEAs.
In the first task, microstructural stability and fracture mechanism of the AlCoCrFeNi alloy are studied and compared with thermodynamic calculations. In the second task, high-cycle fatigue-failure mechanisms of the cold-rolled Al0.5CoCrCuFeNi alloy are …
Structural, Magnetic And Microstructural Studies Of Composition-Modified Sm-Co Ribbons, Xiujuan Jiang
Structural, Magnetic And Microstructural Studies Of Composition-Modified Sm-Co Ribbons, Xiujuan Jiang
Department of Mechanical and Materials Engineering: Dissertations, Theses, and Student Research
There is an increasing interest in developing desirable microstructures in hard magnetic materials. Sm-Co-based magnets, bearing superior intrinsic magnetic properties, are good candidates for further development. Two Sm-Co-based alloys, (Sm12Co88)100-x-yCryCx (taking SmCo7 phase) and SmCo4-xFexB (a derivative of SmCo5 phase), were produced using melt-spinning technique. The magnetic properties are correlated to the structural and microstructural properties.
Within the SmCo7 stoichiometry, cumulative effects of Cr and C additions on the structural and magnetic properties have been investigated. Experimental results have shown that these additions along …