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Determination of Creep Constitutive Law of Solder Materials Using Indentation Creep Test

[+] Author Affiliations
Shinsuke Sakai, Yu Watanabe, Satoshi Izumi, Atsushi Iwasaki

University of Tokyo, Tokyo, Japan

Takeshi Ogawa

Aoyama Gakuin University, Japan

Paper No. PVP2005-71645, pp. 301-305; 5 pages
doi:10.1115/PVP2005-71645
From:
  • ASME 2005 Pressure Vessels and Piping Conference
  • Volume 7: Operations, Applications, and Components
  • Denver, Colorado, USA, July 17–21, 2005
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4192-8 | eISBN: 0-7918-3763-7
  • Copyright © 2005 by ASME

abstract

Authors reported in the previous paper [1] that indentation creep test is effective to evaluate the creep power law from small specimen. We derived the formulation and applied the proposed method to turbine rotor materials. Eventually, it was shown that the method is applicable for the evaluation of creep constitutive law especially under high stress region. Under the low stress region, however, the applicability of the method was not confirmed since it requires much time for the confirmation. As most necessary property for creep deformation is that for low stress region, the extension of the proposed method for the low stress region is considered extremely important. For this purpose, it is not appropriate to use steel materials for the confirmation because it consumes too much time to conduct creep indentation test under low stress. For solder materials, however, it is rather easier to conduct the creep indentation test under low stress because the creep phenomena occur even at room temperature. In this paper, we report the results of creep indentation test for solder materials and examine the applicability of the proposed method. Besides finite element analysis is performed to evaluate stress conversion factor which enables us to evaluate Norton’s law only from creep indentation tests.

Copyright © 2005 by ASME
Topics: Creep , Solders

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