Dynamic nanoindentation testing: is there an influence on a material’s hardness?

Materials Research Letters

V. Maier-Kiener¹  D. Kiener¹  A. Leitner¹ 

[1] Montanuniversität Leoben;

关键词: Nanoindentation;    dynamic indentation testing;    mechanical properties;    strain-rate sensitivity;   

DOI  :  10.1080/21663831.2017.1331384

来源: DOAJ

【 摘 要 】

Modern nanoindentation devices are capable of dynamic experimentations, which allow us to exploit instrumented hardness tests extensively. Beside the assets of recording mechanical properties continuously over displacement, there are ongoing debates whether the superimposed force alters the material’s hardness. We will show for a broad range of materials that significant hardness differences are noted between dynamic and static tests, even for large displacements. Those mainly result from a changing indentation strain-rate during the hold segment at peak load. This fact must be implicitly considered in studies using static indentation tests to guarantee comparability of obtained nanoindentation hardness values and derived quantities.

【 授权许可】

Unknown