High temperature nanoindentation of PMR-15 polyimide

Y. C. Lu, D. C. Jones, G. P. Tandon, S. Putthanarat, G. A. Schoeppner

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


This paper presents the high temperature nanoindentation experiments performed on an aerospace polymer resin-PMR-15 polyimide. The sharp-tipped Berkovich nanoindenter equipped with a hot-stage heating system was used. The indentation experiments were performed using the "hold-at-the-peak" method at various indenter holding times and unloading rates. The creep effect was seen to decrease with increasing holding time and/or unloading rate. Procedures used to minimize the creep effect are investigated at both ambient and elevated temperatures so that the correct contact depth (together with modulus and hardness) can be determined from nanoindentation load-depth curve. The temperature dependent mechanical properties of PMR-15 are measured through the current nanoindenter and results are consistent with those obtained from macroscopic tests.

Original languageEnglish
Pages (from-to)491-499
Number of pages9
JournalExperimental Mechanics
Issue number4
StatePublished - Apr 2010

Bibliographical note

Funding Information:
Acknowledgements This work was partially supported by the American Society of Engineering Education–Summer Faculty Fellowship Program (SFFP) and performed under the direction of Dr. Greg A Schoeppner of Air Force Research Laboratory (AFRL), WPAFB.


  • High temperature
  • Nanoindentation
  • PMR-15 polyimide
  • Viscoelastic creep

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering


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