Wear Behavior of Dual Phase Steels

PROJECT NUMBER: 75

AUTHOR: Chad Matthews, Metallurgical and Materials Engineering | MENTOR: Emmanuel De Moor, Metallurgical and Materials Engineering

ABSTRACT

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This study examines the effect of martensite on the wear characteristics of dual phase (ferrite-martensite) steels. Phase diagrams for heat treating Grade 50 and Grade 80 steels were developed in ThermoCalc. These were used to find salt-pot heat treatments to generate 10%, 30%, 50%, and 70% martensite volume fractions. Once the samples were heat treated, they were DSRW tested (with as-received DP600 samples). Volume loss decreased with increasing martensite volume fractions for both grades, with Grade 80 showing lower volume loss in comparison to Grade 50. The decline in volume loss was sharper for the Grade 50 than Grade 80 due to lower hardness and a more coarse microstructure. The DP600 (10% martensite volume fraction) showed volume loss slightly higher than that of Grade 80 10% martensite.

VISUAL PRESENTATION

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AUTHOR BIOGRAPHY

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Chad Matthews is graduating May 2020 with his BS in Metallurgical and Materials Engineering. He has been performing undergraduate research in the Metallurgy Department since the Summer of 2018 as well as undergraduate research with Idaho National Lab Summer of 2019. In that time, he has worked on projects involving structural cables, pipelines, earth moving equipment (current project), and advanced lightweight armor for the US military (INL internship project). He has been the recipient of the BRIDGE Fellowship, Mines Undergraduate Research Fellowship, American Bureau of Shipping Scholarship, the De Laat, Bart & Helen Scholarship, and the MME department’s Clark B Carpenter Award for outstanding graduating senior. After school, Chad is going to work for Texas Instruments as a Process Engineer where he will be developing and improving manufacturing processes for silicon microchips.

Sponsored by Phillips 66