Open Forum: Vickers Indentation Technique-Problems and Solutions

2012 ◽  
pp. 153-159
Author(s):  
Ahmad G Solomah
Keyword(s):  
Vickers Indentation ◽  
Open Forum ◽  
Indentation Technique ◽  
Problems And Solutions

Evaluating microhardness of plasma sprayed Al2O3coatings using Vickers indentation technique

2007 ◽  
Vol 40 (22) ◽  
pp. 7090-7096 ◽  
Author(s):  
Zhijian Yin ◽  
Shunyan Tao ◽  
Xiaming Zhou ◽  
Chuanxian Ding
Keyword(s):  
Vickers Indentation ◽  
Indentation Technique ◽  
Plasma Sprayed

Comparison and Relative Error of Elastic Modulus in Glass Measured by Three Test Techniques

2010 ◽  
Vol 434-435 ◽  
pp. 209-213
Author(s):  
Yan Qiu ◽  
Yi Wang Bao ◽  
Xiao Gen Liu ◽  
Xiu Fang Wang ◽  
Kun Ming Li
Keyword(s):  
Elastic Modulus ◽  
Dynamic Modulus ◽  
Dynamic Method ◽  
Static Method ◽  
Vickers Indentation ◽  
Indentation Technique ◽  
Hardness Tester ◽  
Static Modulus ◽  
Indentation Tests ◽  
Depth Curve

Elastic modulus of glass was measured using static method, dynamic method and Vickers indentation technique, respectively. The residual indent of Vickers indentation is analyzed to estimate the elastic modulus, using conventional hardness tester without load-depth curve. The modulus and hardness of glass are determined by load, deformation and residual semi-angle of the indent. The result is compared with the modulus obtained by conventional dynamic and static methods. It was shown that the modulus measured by dynamic method provides the highest value and the modulus obtained by indentation technique is between the values of dynamic modulus and static modulus. The result also shows that the modulus measured by dynamic method has very stable value and that measured by bending method has the lowest value. The modulus obtained in indentation tests shows relatively greater scatter.

Evaluation of Brittle Layers Obtained by Boriding on AISI H13 Steels

2009 ◽  
Vol 65 ◽  
pp. 47-52 ◽  
Author(s):  
N. López-Perrusquia ◽  
Ivan Campos-Silva ◽  
José Martínez-Trinidad ◽  
A. Avilés ◽  
E. Alvárez-Castañeda ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Boride Layer ◽  
Vickers Indentation ◽  
Indentation Technique ◽  
Substrate Interface ◽  
Aisi H13 ◽  
Boriding Process ◽  
Brittle Layers ◽  
Poor Adhesion ◽  
Borided Steel

The fracture toughness of AISI H13 borided steel and the strength adhesion of the coated system were estimated in the present work. The formation of the layers was carried out by the powder pack boriding process at 1273 K with 8 h of treatment. The fracture toughness (KC) of the layer is estimated at 25 and 45 m from the surface using four different Vickers indentation loads. The KC values were estimated by the extension of Palmqvist cracks parallel and perpendicular to the surface obtained at the indentation corners. The adherence of the layer/substrate was evaluated in qualitative form through the Rockwell-C indentation technique. The results obtained by both techniques, show, in first instance, that the fracture toughness of the boride layer can be expressed in the form (KC) (π/2) > (KC) > (KC) (0). Also, high delamination is obtained around the Rockwell-C indentation prints that denote poor adhesion in the coating-substrate interface.

Statistical evaluation of nano-structured hydroxyapatite mechanical characteristics by employing the Vickers indentation technique

2020 ◽  
Vol 46 (12) ◽  
pp. 20081-20087 ◽  
Author(s):  
Hassan Nosrati ◽  
Rasoul Sarraf-Mamoory ◽  
Dang Quang Svend Le ◽  
Amir Hossein Ahmadi ◽  
Maria Canillas Perez ◽  
...  
Keyword(s):  
Mechanical Characteristics ◽  
Statistical Evaluation ◽  
Vickers Indentation ◽  
Indentation Technique

The Fracture Toughness and DBTT of MoB Particle-Reinforced MoSi2 Composites

2007 ◽  
Vol 280-283 ◽  
pp. 1471-1474
Author(s):  
Zhi Xiong ◽  
Gang Wang ◽  
Wan Jiang
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
High Temperature ◽  
Room Temperature ◽  
Probable Mechanism ◽  
Vickers Indentation ◽  
Indentation Technique ◽  
Testing Method ◽  
Temperature Fracture

The room temperature fracture toughness and the high temperature DBTT of MoB particle-reinforced MoSi2 composites were investigated using Vickers indentation technique and MSP testing method， respectively. Modified Small Punch (MSP) test is a method for evaluation of mechanical properties using very small specimens, and it’s appropriate for the determination of strength and DBTT. It was found that the approximate fracture toughness of the composite is 1.3 times that of monolithic MoSi2, and its DBTT is 100°C higher than that of monolithic MoSi2 materials. Cracks deflection is a probable mechanism responsible for this behavior.

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