Knoop Hardness Test - Instron：用於拉伸、疲勞、撞擊及硬度測試的材料試驗機

Knoop tests have mainly been known as microhardness tests. ... Knoop Test Knoop (HK) hardness was developed by at the National Bureau of Standards (now NIST) in 1939. The indenter used is a rhombic-based pyramidal diamond that produces an ...

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