Comparison of EBSD-based plastic strain estimation of Alloy 690 strained at 500–650 °C and at room temperature
2017 (English)Report (Other academic)
The validity of plastic strain estimation using electron backscatter diffraction (EBSD) in a warm deformed material with cold deformed reference materials has been investigated. Nickel-base Alloy 690, recovery heat treated at 1050 °C, was used in this study and deformed at room temperature and at 500– 650 °C. Grain orientation spread (GOS) was used as misorientation metric.Both GOS and hardness of the warm deformed materials were lower than for cold deformed materials of comparable applied strain, and was attributed to dynamic recovery. The hardness of the warm deformed materials was nonetheless comparable to cold deformed materials with similar GOS, although being slightly lower on average. These results show that GOS does not give an accurate estimate of applied deformation for warm deformation. It still gives a rough estimate of the effective plastic strain, albeit results suggest it may be a slight overestimation.
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2017. , 9 p.
TRITA-HFL. Report / Royal Institute of Technology, Solid Mechanics, ISSN 1654-1472 ; 612
electron backscatter diffraction, plastic deformation, warm deformation, hardness, nickel-base alloy
Metallurgy and Metallic Materials
Research subject Materials Science and Engineering; Solid Mechanics
IdentifiersURN: urn:nbn:se:kth:diva-202571OAI: oai:DiVA.org:kth-202571DiVA: diva2:1077632
QC 201703012017-02-282017-02-282017-03-03Bibliographically approved