On Indentation Hardness (4th Report)

Spherical Indentation Hardness of Shape Memory Alloys

Conventional Vickers and true instrumented indentation hardness determined by instrumented indentation tests

We evaluate Vickers hardness and true instrumented indentation test (IIT) hardness of 24 metals over a wide range of mechanical properties using just IIT parameters by taking into account the real contact morphology beneath the Vickers indenter. Correlating the conventional Vickers hardness, indentation contact morphology, and IIT parameters for the 24 metals reveals relationships between conta...

Experimental and Finite Element Simulation of Nano-indentation on Metal Matrix Composites: Hardness Prediction

The scientific importance of nanocomposites are being increased due to their improvedproperties. This paper is divided into two parts. First, Al-Al2O3 nanocomposite wasproduced by using ball milling technique followed by cold compaction and sintering.Microstructure and morphology studies were done through SEM, TEM, and EDX anal-ysis on the produced powder. The mechanical properties of the produ...

Indentation Hardness of the Bill Keratin of the European Starling’

DUFFY, D. C. 1989. Seabird foraging aggregations: a WANLESS, S., A. E. BURGER, AND M. P. HARRIS. 1991. comparison of two southern upwellings. Colon. Diving depths of shags Phalacrocorax aristoletis Waterbirds 12: 164-l 75. breeding on the Isle of May. Ibis 133:37-42. PIATT, J. F., AND D. N. NETTLESHIP. 1985. Diving WILSON, R. P. 1985. The Jackass Penguin (Sphendepths of four alcids. Auk 102:293...

On the Relation between Indentation Hardness and the True Stress-strain

A new and powerful indentation hardness (H) approach to evaluating the true stress (σ)-true plastic strain (ε), σ(ε), constitutive behavior of materials is described. Since measurements of H intrinsically probe a wide-range of ε (up to ≈0.5) , accurate assessment of the corresponding yield (σy) stress and strain hardening [σsh(ε)] pose a significant challenge. Extensive elastic-plastic finite ...