Indentation creep vs. indentation relaxation: A matter of strain rate definition?
作者: Paul BaralGuillaume KermoucheGaylord GuillonneauGabrielle TipheneJean-Michel BergheauWarren C. OliverJean-Luc Loubet
作者单位: 1Univ. Lyon, Ecole Centrale de Lyon, CNRS UMR 5513 LTDS, F-69134, Ecully, France
2Mines Saint Etienne, Université de Lyon, CNRS UMR 5307 LGF, Centre SMS, F-42023, Saint Etienne, France
3Univ. Lyon, Ecole Nationale d’Ingénieurs de Saint Etienne, CNRS UMR 5513 LTDS, F-42023, Saint Etienne, France
4KLA Nanomechanics Inc., Oak Ridge, TN 37830, USA
刊名: Materials Science & Engineering A, 2020, Vol.781
来源数据库: Elsevier Journal
DOI: 10.1016/j.msea.2020.139246
关键词: NanoindentationStrain rate sensitivityRelaxationCreepSelenium
原始语种摘要: Abstract(#br)An extensive study of the different methods able to measure material creep properties in indentation is proposed. A systematic comparison of the fast creep, long-term creep, constant strain rate and long-term relaxation tests is performed on amorphous selenium. Even though measured apparent activation energy and strain rate sensitivities are very similar for all tests, a discrepancy is highlighted between the creep/constant strain rate tests and the relaxation tests. This effect seems to be related to the strain rate definition which should be a function of the strain rate sensitivity m . In this paper, it is proposed to use a representative strain rate ϵ ̇ r as proposed by Kermouche et al. (2008). An excellent agreement is found between all the methods,...
全文获取路径: Elsevier  (合作)
影响因子:2.108 (2012)

  • strain 应变
  • creep 蠕变
  • indentation 锯齿痕
  • representative 代理的
  • definition 清晰度
  • relaxation 松弛
  • extensive 广泛的
  • proposed 建议的
  • agreement 协议
  • constant 常数