Influence of the Upper Die and of the Indenter Material on the Time to Rupture of Small Punch Creep Tests

0476930 - ÚFM 2018 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Andrés, D. - Dymáček, Petr - Lacalle, R. - Álvarez, J. A.
Influence of the Upper Die and of the Indenter Material on the Time to Rupture of Small Punch Creep Tests.
Small Sample Test Technique. Zürich: Trans Tech Publications, 2017 - (Guan, K.; Matocha, K.; Xu, T.), s. 119-127. Key Engineering Materials, 734. ISBN 978-3-0357-1106-6. ISSN 1013-9826.
[SSTT 2016 - International Conference on Small Sample Test Technique /4./. Shanghai (CN), 12.10.2016-14.10.2016]
Grant CEP: GA MŠMT(CZ) ED1.1.00/02.0068
Institucionální podpora: RVO:68081723
Klíčová slova: small punch test * creep * high temperature * light alloys
Obor OECD: Materials engineering

The Small Punch Creep test has proven to be a suitable technique for assessing the
properties of in-service components. It is a reliable, efficient and cost-effective test for predicting
the behaviour of the material. The aim of this paper is to analyse the influence of different factors
on the Small Punch Creep (SPC) tests. The influence of the specimen clamping has been studied,
experimentally and by means of finite element models on different materials. In the analysed
conditions, it has been proven that the influence of the upper die on the tests results is generally
relatively insignificant, even in the absence of upper die.
Furthermore, the use of different materials at the punch has also been analysed. In order to achieve
this goal, SPC tests have been carried out on two light alloys (AZ31 and AlSi9Cu3) at 473 and
523K. Three different balls have been employed: ceramic, tungsten-carbide and steel balls. It has
been proven that for the creep ductile alloy (AZ31), there is no apparent effect on the specimen
response. On the other hand, for the creep brittle alloy (AlSi9Cu3), a different trend of the material
response is shown, dependent on the ball used. As a result, there seems to be a significant influence
of the friction between the punch and the specimen on the tests results, related to the material
behaviour.
Trvalý link: http://hdl.handle.net/11104/0273684