Project Info
Fatigue Properties of Grain Refined High Hardness Steel
Robert Cryderman | rcryderm@mines.edu
A heat treating process has been developed to produce high carbon steels with austenite grain sizes down to 5 microns, that when hardened to hardness above 60 Rc, exhibit high notched fracture strength. In this project, notched specimens of steels with different austenite grain sizes will be cyclically loaded at selected stress/strain levels to establish the influence of austenite grain size on fatigue performance.
More Information
“Cryderman, R. and Speer, J.,” Microstructure and Notched Fracture Resistance of 0.56% C Steels After Simulated Induction Hardening,” Proc. 29th ASM Heat Treating Society Conference, Columbus, OH, Oct 24-26, 2017, pp. 226-233.
Cryderman, R. and Ballard, T.,” Short Time Austenitizing Effects on the Hardenability of Some 0.55 wt. pct. Carbon Steels,” Proc. 24th IFHTSE CONGRESS 2017, Nice, France, June 26-29, 2017.”
Grand Engineering: Not applicable
Student Preparation
Qualifications
“Some hands on experience with mechanical testing such as tensile or bend testing would be helpful.
Knowledge of data analysis using xcel or similar spreadsheets.”
Time Commitment
40-50 hours/month
Skills/Techniques Gained
“Knowledge of methods involved in fatigue testing.
Understanding of fracture surfaces and how they relate to microstructure by utilizing scanning electron microscopy .
Ability to analyze large volumes of test data to determine key parameters of interest.”
Mentoring Plan
“Provide a clear set of project goals and timelines.
Discuss methods involved in testing and key outputs.
Introduce fellow to graduate students (TA’s) that can provide detailed guidance on testing in the laboratories.
Meet with fellow on a regular basis to review progress and discuss any problems.
Provide guidance on preparing a report of the project – including a poster.”