TY - JOUR
T1 - Sub-surface microstructural evolution and chip formation during turning of AF 9628 steel
AU - Hasbrouck, C. R.
AU - Hankey, Austin S.
AU - Abrahams, Rachel
AU - Lynch, Paul C.
N1 - Funding Information:
The authors would like to acknowledge the following undergraduate researchers from Penn State Behrend for their assistance with data collection for this study: Bryan Boarts for his manual lathe work; Elizabeth Gaughan for organization of data and manually machined chip morphology pictures; and Sean Flanagan, Christopher Lang, Kristen Collins, Matthew Gielarowski, and Jackson Craig for their help with optical profilometry for surface roughness measurements, hot mounting of samples, and polishing samples for metallographic analysis. The following people from Gene Davis Sales and Service, Steel Supply and Fabrication receive the authors' gratitude for their willingness to help cut parts to ease the data collection process: Ben Davis, John McWilliams, John Luebbert, and Chris Ceznik. Lastly, a big thank you to Travis Richner of the Factory for Advanced Manufacturing Education Laboratory at Pennsylvania State University for his advice and assistance with completing the CNC lathe operations.
Publisher Copyright:
© 2020 The Authors. Published by Elsevier B.V.
PY - 2020
Y1 - 2020
N2 - High-strength low-alloy (HSLA) steels are desired for their high strength-to-weight ratio, relatively low cost, good overall mechanical properties, and relative ease of processing. The development of Eglin steel and AF 9628 has facilitated the current wave of research into next-generation HSLA steels. These alloys are characterized by both high levels of strength and increased levels of ductility and impact toughness over traditional HSLA alloys such as AISI 4340/4330. AF 9628 has proven difficult to machine due to strain hardening while turning. Manual and CNC turning experiments were carried out on AF 9628 cylindrical bars based on current machining practices. In an effort to optimize material removal rate and tool life, quantitative measurements of tool flank wear, surface roughness, hardness, microhardness, and chip thickness were taken. Qualitative observations made on microstructural evolution and chip color and morphology are also discussed.
AB - High-strength low-alloy (HSLA) steels are desired for their high strength-to-weight ratio, relatively low cost, good overall mechanical properties, and relative ease of processing. The development of Eglin steel and AF 9628 has facilitated the current wave of research into next-generation HSLA steels. These alloys are characterized by both high levels of strength and increased levels of ductility and impact toughness over traditional HSLA alloys such as AISI 4340/4330. AF 9628 has proven difficult to machine due to strain hardening while turning. Manual and CNC turning experiments were carried out on AF 9628 cylindrical bars based on current machining practices. In an effort to optimize material removal rate and tool life, quantitative measurements of tool flank wear, surface roughness, hardness, microhardness, and chip thickness were taken. Qualitative observations made on microstructural evolution and chip color and morphology are also discussed.
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U2 - 10.1016/j.promfg.2020.05.083
DO - 10.1016/j.promfg.2020.05.083
M3 - Conference article
AN - SCOPUS:85094880742
SN - 2351-9789
VL - 48
SP - 559
EP - 569
JO - 48th SME North American Manufacturing Research Conference, NAMRC 48
JF - 48th SME North American Manufacturing Research Conference, NAMRC 48
T2 - 48th SME North American Manufacturing Research Conference, NAMRC 48
Y2 - 22 June 2020 through 26 June 2020
ER -