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 ${\dot{ϵ}}_r$ as proposed by Kermouche et al. (2008). An excellent agreement is found between all the methods, including uniaxial compression when expressing the creep behavior as a function of representative stress and strain rate.

提出了对能够测量压痕材料蠕变特性的不同方法的广泛研究。对非晶态硒进行了快速蠕变，长期蠕变，恒定应变率和长期弛豫测试的系统比较。即使在所有测试中测得的表观活化能和应变速率敏感性非常相似，但蠕变/恒定应变速率测试与松弛测试之间仍存在差异。此效应似乎与应变率定义有关，应变率定义应为应变率灵敏度的函数$米$。在本文中，建议使用代表应变率${\dot{ϵ}}_{\mathrm{[R}}$如Kermouche等人提出的。（2008）。在所有方法之间都发现了极好的一致性，包括在将蠕变行为表示为代表应力和应变速率的函数时进行单轴压缩。