Theses and Dissertations
Issuing Body
Mississippi State University
Advisor
Horstemeyer, F. Mark
Committee Member
Kadiri, El Haitham
Committee Member
Berry, T. John
Committee Member
Hammi, Youssef
Date of Degree
8-8-2009
Document Type
Dissertation - Open Access
Major
Mechanical Engineering
Degree Name
Doctor of Philosophy
College
James Worth Bagley College of Engineering
Department
Department of Mechanical Engineering
Abstract
Developing a multi-scale math-based model for powder metallurgy (PM) component design and performance prediction requires experimental calibration and validation. Monotonic tension, compression and torsion tests were performed at various porosity and temperatures to obtain the set of plasticity and damage constants required for model calibration. Uniaxial fatigue experiments were performed to determine the constants required for capturing the low cycle and high cycle fatigue characteristics of a PM steel. Tension tests on two different Bridgman notched specimens were undertaken to study the damage-triaxiality dependence for model validation. Validation of the model is further being performed by monotonic component testing using PM bearing caps. Fracture surface analysis was performed using Scanning Electron Microscopy (SEM) to quantify the void nucleation and void sizes of the different specimens. The developed model will be used for optimizing component performance and design for PM parts.
URI
https://hdl.handle.net/11668/15473
Recommended Citation
Allison, Paul Galon, "Structure-property relations for monotonic and fatigue loading conditions for a powder metal steel" (2009). Theses and Dissertations. 4092.
https://scholarsjunction.msstate.edu/td/4092
Comments
Powder Metallurgy||FC-0205||Mechanical Testing||Fatigue