Characterization of plastic instability steps occurring in depth-sensing indentation tests

2002 ◽  
Vol 324 (1-2) ◽  
pp. 219-224 ◽  
Author(s):  
N.Q Chinh ◽  
Gy Horváth ◽  
Zs Kovács ◽  
J Lendvai
Keyword(s):  
Plastic Instability ◽  
Depth Sensing ◽  
Indentation Tests

scholarly journals Depth-sensing indentation tests in studying plastic instabilities

2004 ◽  
Vol 19 (1) ◽  
pp. 31-45 ◽  
Author(s):  
N.Q. Chinh ◽  
J. Gubicza ◽  
Zs. Kovács ◽  
J. Lendvai
Keyword(s):  
Grain Size ◽  
Metallic Glasses ◽  
Bulk Metallic Glasses ◽  
Solute Concentration ◽  
Metal Alloys ◽  
Depth Sensing ◽  
Serrated Flow ◽  
Indentation Tests ◽  
Grain Size And Orientation

This review surveys the phenomenon of plastic instabilities occurring in depth-sensing indentation measurements. Investigations presented focus on the characterization of Portevin–Le Châtelier type instabilities observed in different metal alloys during indentation. The effect of some important factors such as solute concentration, the formation of Guinier–Preston zones, and grain size and orientation are described and discussed. The phenomenon of plastic instabilities as serrated flow recently observed in bulk metallic glasses is also briefly reviewed.

scholarly journals Characterization of mechanical properties by indentation tests and FE analysis – validation by application to a weld zone of DP590 steel

2009 ◽  
Vol 46 (2) ◽  
pp. 344-363 ◽  
Author(s):  
Kyung-Hwan Chung ◽  
Wonoh Lee ◽  
Ji Hoon Kim ◽  
Chongmin Kim ◽  
Sung Ho Park ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Weld Zone ◽  
Fe Analysis ◽  
Indentation Tests

scholarly journals Analysis of depth-sensing indentation tests with a Knoop indenter

2001 ◽  
Vol 16 (6) ◽  
pp. 1660-1667 ◽  
Author(s):  
L. Riester ◽  
T. J. Bell ◽  
A. C. Fischer-Cripps
Keyword(s):  
Elastic Modulus ◽  
Elastic Recovery ◽  
Indentation Test ◽  
New Method ◽  
Short Axis ◽  
Depth Sensing ◽  
Specimen Material ◽  
Indentation Tests ◽  
Conventional Methods ◽  
Knoop Indenter

The present work shows how data obtained in a depth-sensing indentation test using a Knoop indenter may be analyzed to provide elastic modulus and hardness of the specimen material. The method takes into account the elastic recovery along the direction of the short axis of the residual impression as the indenter is removed. If elastic recovery is not accounted for, the elastic modulus and hardness are overestimated by an amount that depends on the ratio of E/H of the specimen material. The new method of analysis expresses the elastic recovery of the short diagonal of the residual impression into an equivalent face angle for one side of the Knoop indenter. Conventional methods of analysis using this corrected angle provide results for modulus and hardness that are consistent with those obtained with other types of indenters.

scholarly journals Influence of Vickers tip imperfection on depth sensing indentation tests

2007 ◽  
Vol 44 (9) ◽  
pp. 2732-2747 ◽  
Author(s):  
J.M. Antunes ◽  
L.F. Menezes ◽  
J.V. Fernandes
Keyword(s):  
Depth Sensing ◽  
Indentation Tests

Mechanical Characterization of Metal Sheets by Means of Double Indentation

2007 ◽  
Vol 344 ◽  
pp. 127-134 ◽  
Author(s):  
Fabrizio Quadrini ◽  
Loredana Santo ◽  
Erica Anna Squeo
Keyword(s):  
Small Diameter ◽  
Tensile Tests ◽  
Testing Rate ◽  
Metal Sheets ◽  
Indentation Tests ◽  
Tensile Data ◽  
On Line ◽  
Fast Procedure ◽  
Non Destructive

An easy and innovative technique for metal sheet characterization is described. A double indentation is performed on sheets by means of two co-axial small diameter flat indenters made of WC. A very small indentation is left on the sheet, so as to consider this technique a non destructive one, particularly suitable for on-line application. The proposed method was tested on sheets of aluminum alloy (6082 T6) with several thicknesses (nominally 0.6, 0.8, 1 and 1.5 mm). Double indentations were performed changing indenter diameter (1 and 2 mm) and testing rate (from 0.05 to 1 mm/min). In order to make a comparison with indentation tests, flat specimens were cut from the same sheets and standard tensile tests were performed. A very good correlation was found between indentation and tensile test results, showing the effectiveness of the proposed method. A suitable data normalization is necessary to correctly compare indentation and tensile data. The best results were obtained using the smaller diameter indenter. The testing rate seems to be not relevant in the experimented range, suggesting that a fast procedure can be defined on purpose for on-line application.

Loop energy: A useful indicator of the hardness of minerals from depth-sensing indentation tests

2018 ◽  
Vol 117 ◽  
pp. 96-104
Author(s):  
Toshiaki Masuda ◽  
Yasutomo Omori ◽  
Ryoko Sakurai ◽  
Tomoya Miyake ◽  
Mirai Yamanouchi ◽  
...  
Keyword(s):  
Depth Sensing ◽  
Indentation Tests

Nano-mechanical characterization of plasma surface tungstenized layer by depth-sensing nano-indentation measurement

2015 ◽  
Vol 324 ◽  
pp. 160-167 ◽  
Author(s):  
Hongyan Wu ◽  
Yin Li ◽  
Xiao Tang ◽  
G. Hussain ◽  
Haofeng Zhao ◽  
...  
Keyword(s):  
Mechanical Characterization ◽  
Depth Sensing ◽  
Plasma Surface ◽  
Nano Indentation ◽  
Indentation Measurement

Simulation of sub-micron indentation tests with spherical and Berkovich indenters

2001 ◽  
Vol 16 (7) ◽  
pp. 2149-2157 ◽  
Author(s):  
A. C. Fischer-Cripps
Keyword(s):  
Experimental Data ◽  
Elastic Modulus ◽  
Material Properties ◽  
Indentation Testing ◽  
Depth Sensing ◽  
Displacement Response ◽  
Analysis Methods ◽  
Detailed Treatment ◽  
Indentation Tests ◽  
Load Displacement

The present work is concerned with the methods of simulation of data obtained from depth-sensing submicron indentation testing. Details of analysis methods for both spherical and Berkovich indenters using multiple or single unload points are presented followed by a detailed treatment of a method for simulating an experimental load–displacement response where the material properties such as elastic modulus and hardness are given as inputs. A comparison between simulated and experimental data is given.

Sign in / Sign up

Export Citation Format

Share Document