Authors: Loveday, Malcolm S.; Gibbons, Thomas B.

Source: Materials at High Temperatures, Volume 24, Number 2, July 2007 , pp. 113-118(6)

Publisher: Science Reviews 2000 Ltd

Abstract:

Revision is currently underway of both the Creep Testing and the Extensometer Calibration Standards by the ISO committee TC164 SC1 which prompted the need to update the Code of Practice giving guidance on the use of Ni-base alloy extensometry to avoid the erroneous measurement of negative creep. This paper presents the underlining evidence of the dimensional changes due to order-disorder transitions in Ni-base super-alloys used for extensometer limbs and provides an updated version of the Code of Practice.

Keywords: creep strain; order-disorder transformation; Ni-Cr-base alloys; Ni-base alloy extensometers

Document Type: Research article

DOI: http://dx.doi.org/10.3184/096034007X225543

Affiliations: 1: Beta Technology Consultant, National Physical Laboratory, Teddington TW11 0LW, UK

Publication date: 2007-07-20

More about this publication?

• Materials at High Temperatures serves the needs of those who develop and use materials for high temperature applications. It publishes peer reviewed contributions relating to high temperature applications in the power, chemical, engine, processing and furnace industries.

  The effects of high temperatures on corrosion, fatigue, creep, strength and wear in alloys, intermetallics, ceramics, refractories and composites are covered. Papers dealing with aspects of materials usage including modelling of behaviour and life prediction will be particularly welcome. The journal has a policy of emphasizing practical aspects and authors presenting results from research programmes are encouraged to relate these, if possible, to actual or potential applications.

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