Vickers hardness testing of resistance spot, projection and seam welds (low load and microhardness)

2015 ◽  
Keyword(s):  
Vickers Hardness ◽  
Hardness Testing ◽  
Resistance Spot ◽  
Low Load

Analysis of Load-Displacement Curves of Ceramics Measured with Low-Load Vickers Hardness Test: Indentation Size Effect

2011 ◽  
Vol 492 ◽  
pp. 9-13
Author(s):  
Bei Xu ◽  
Jiang Hong Gong
Keyword(s):  
Size Effect ◽  
Vickers Hardness ◽  
Indentation Size Effect ◽  
Hardness Test ◽  
Hardness Testing ◽  
Indentation Size ◽  
Nanoindentation Testing ◽  
Low Load ◽  
Load Displacement ◽  
Vickers Hardness Test

The load-displacement curves for a series of ceramic and glass samples were recorded continuously during the low-load Vickers hardness testing. Then the hardnesses of all samples were determined by analyzing the unloading curves. It was found that all the test materials exhibit indentation size effect (ISE) similar to that observed in nanoindentation testing. The applicability of the proportional specimen resistance (PSR) model and the modified PSR model was then examined using the measured indentation data.

Elastic/plastic effects during very low-load hardness testing of copper

1995 ◽  
Vol 43 (3) ◽  
pp. 1037-1043 ◽  
Author(s):  
R.W. Armstrong ◽  
H. Shin ◽  
A.W. Ruff
Keyword(s):  
Hardness Testing ◽  
Elastic Plastic ◽  
Low Load

Substitution of Iron in Preparation of Enhanced Thermal Property and Bioactivity of Hydroxyapatite

2008 ◽  
Vol 55-57 ◽  
pp. 689-692 ◽  
Author(s):  
S. Meejoo ◽  
W. Pon-On ◽  
S. Charnchai ◽  
T. Amornsakchai
Keyword(s):  
Thermal Property ◽  
Vickers Hardness ◽  
Crystalline Phase ◽  
Vickers Microhardness ◽  
Experimental Methods ◽  
Hardness Testing ◽  
Thermal Behaviors ◽  
Carbonate Ions ◽  
Novel Material ◽  
Better Than

Incorporation of Iron into hydroxyapatite (HAp) has generated a novel material for which their properties differ from those of conventional HAp. Although XRD indicated that the as-prepared iron-substituted hydroxyapatite (HApFe) is of a single crystalline phase similar to that of HAp, we found that carbonate ions can incorporate in the HApFe structure 3 times better than in HAp. As results, HApFe possesses the Vickers microhardness about 1.5 times higher than that of HAp. Thermal behaviors and bioactivity of HApFe are discussed in comparison to those of HAp. Various experimental methods have been employed in this work including powder XRD, IR, SEM, DSC/TGA and Vickers Hardness testing.

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