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Mechanical property evaluation using the small punch test
KTH, Superseded Departments, Materials Science and Engineering.
KTH, Superseded Departments, Materials Science and Engineering.ORCID iD: 0000-0002-8494-3983
2004 (English)In: Journal of Testing and Evaluation, ISSN 0090-3973, E-ISSN 1945-7553, Vol. 32, no 4, 282-289 p.Article in journal (Refereed) Published
Abstract [en]

The small punch (SP) test technique is an attractive method for evaluating mechanical behavior in materials where only small volumes of materials are available. An SP-test machine was developed where miniature disc specimens 5 and 3 mm in diameter and with thickness ranging between 50 to 400 mum can be investigated. For two materials, a 1Cr-0.5Mo low alloy steel and an 18Cr-9Ni austenitic stainless steel, the stress-strain flow curve was assessed and compared with that in tensile tests. The yield strength was determined from the SP-test by analyzing the initial elastic deformation with help of classical plate bending theory. The effective flow properties in the biaxial stress state were evaluated through analytical modelling of the stretching deformation. Good agreement between the uniaxial and biaxial flow properties was found for the 1wCr-0.5Mo steel and acceptable agreement for the 18Cr-9Ni steel.

Place, publisher, year, edition, pages
2004. Vol. 32, no 4, 282-289 p.
Keyword [en]
gas-turbine blades, fracture-toughness, alloy-steel, degradation, coatings
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-23640DOI: 10.1520/JTE11504ISI: 000223236600004Scopus ID: 2-s2.0-4544349820OAI: oai:DiVA.org:kth-23640DiVA: diva2:342339
Note

QC 20100525 QC 20111101

Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Sandström, Rolf

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