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Correlation between material properties, grinding effects and Barkhausen noise measurements for two crankshaft steels

Författare och institution:
Marie Doverbo (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik)
Serie:
Diploma work - Department of Materials and Manufacturing Technology, Chalmers University of Technology
Antal sidor:
46
Publikationstyp:
Examensarbete på avancerad nivå
Program:
Civilingenjör ()
Förlag:
Chalmers University of Technology
Förlagsort:
Göteborg
Publiceringsår:
2012
Språk:
engelska
Fulltextlänk (lokalt arkiv):
Sammanfattning (abstract):
The crankshaft steel of two suppliers has been shown to yield differing Barkhausen measurements despite corresponding material specifications and identical manufacturing. In this thesis the reason for this discrepancy is investigated and an hypothesis regarding its cause is formulated. The conclusions are reached through experimental work, wherein the material properties of the two steels are compared. The difference in ductility is related to the difference in Barkhausen Noise Amplitude (BNA) through the grinding process such that the increased ductility is believed to increase the chip build up in the grinding wheel, thus resulting in higher grinding temperature. This would increase the risk for grinding burns and moves the residual stresses towards tensile, which changes the BNA. Suggestions for future work all concern the verification of this hypothesis.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
TEKNIK OCH TEKNOLOGIER ->
Materialteknik
TEKNIK OCH TEKNOLOGIER ->
Materialteknik ->
Metallurgi och metalliska material
Chalmers styrkeområden:
Materialvetenskap
Produktion
Postens nummer:
164652
Posten skapad:
2012-10-12 09:29
Posten ändrad:
2013-04-04 09:59

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