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Engineering | Undergraduate Research

Evaluation of fatigue damage accumulation in metals under multiaxial conditions

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Evaluation of fatigue damage accumulation in metals under multiaxial conditions

Dr. Pedro Peralta, a Professor for the School of Mechanical and Aerospace Engineering of the Ira A. Fulton Schools of Engineering has a research opening for the following project:

Fatigue damage is one of the most widespread causes of failure in metallic structures used on a wide variety of civil and military applications, and while there is extensive knowledge on it, a large fraction of that knowledge has been obtained using uniaxial testing, which is not fully representative of the state of stress found in complex structures. In this project, specially designed samples of pure nickel and a nickel-based superalloy will be designed in a such a way that a biaxial state of stress is produced in the gauge of the sample when they subjected to load, and they will be tested under cyclic stresses leading to high cycle fatigue conditions. The gauge length of the sample will be monitored via interrupted testing to quantify development of slip bands, with particular attention to their interactions with grain boundaries. Electron microscopy techniques, e.g., electron backscattering diffraction, will be used to characterize microstructure and correlate surface observation to the underlying microstructure. Techniques involved include high precision sample preparation, general mechanical testing, laser interferometry, optical and electron microscopy, among others. Training will be provided.

Sub-Themes:

  • Fatigue failure
  • Mechanical testing

Student qualifications/requirements: 

Motivated individuals, with strong skills for self- and guided learning are needed for this project. Must have an A in MAE 213 or MSE 211 (for undergrads) or an A in either MAE 529 (preferred), MAE 520 or MSE 523 (for graduate students). Those with lab experience will be given preference. GPA of at least 3.5. Mechanical, aerospace or materials engineering students can apply.

Send your CV and unofficial ASU transcripts, as well as brief cover letter describing qualifications.

Semester(s) or start/end date of position:Fall 2018-May 2019

Number of hours per week: At least 10.

Stipend amount/hourly wage/volunteer position:Volunteer

Lab/Center website: http://faculty.engineering.asu.edu/pperalta/

How to apply:Send documents via e-mail to pperalta@asu.edu

Skills

Posted on

October 5, 2018