scholarly journals Estimating Residual Stress Value by Vickers Indentation in Zirconia Ceramics

2003 ◽  
Vol 52 (11) ◽  
pp. 1385-1390 ◽  
Author(s):  
Tarou TOKUDA ◽  
Mitsuo KIDO
Keyword(s):  
Residual Stress ◽  
Vickers Indentation ◽  
Zirconia Ceramics

X-ray Fractographic Study on Alumina and Zirconia Ceramics

1990 ◽  
Vol 34 ◽  
pp. 719-727 ◽  
Author(s):  
Sumio Tanaka ◽  
Yukio Hirose ◽  
Keisuke Tanaka
Keyword(s):  
Fracture Toughness ◽  
Residual Stress ◽  
Fracture Surface ◽  
High Strength Steels ◽  
High Strength ◽  
Fatigue Tests ◽  
Fracture Mechanisms ◽  
Zirconia Ceramics ◽  
X Ray ◽  
Fractographic Study

The residual stress left on the fracture surface is one of the important parameters in X-ray fractographic study. It has been used to analyze fracture mechanisms in fracture toughness and fatigue tests especially of high strength steels.In this paper, X-ray fractography was applied to brittle fracture of alumina (Al2O3) and zirconia (ZΓO2) ceramics.

Cracking and Delamination Behavior of Gold Thin Strip Deposited on Polycarbonate Plate under Cyclic and Stepwisely-Increased Trapezoidal Tension

2014 ◽  
Vol 595 ◽  
pp. 36-44 ◽  
Author(s):  
Ya Fei Hu ◽  
Naoya Tada ◽  
Ichiro Shimizu
Keyword(s):  
Thin Films ◽  
Residual Stress ◽  
Mechanical Loading ◽  
Interactive Effect ◽  
Tensile Loading ◽  
Thin Strip ◽  
Vickers Indentation ◽  
Cyclic Tension ◽  
Plate Specimen ◽  
Delamination Behavior

Cracking and delamination behavior of small rounded-rectangular gold thin films called “strips” with a thickness less than one micrometer was observed under cyclic and stepwisely-increased trapezoidal tensions. Three strips in different directions were deposited on a polycarbonate plate specimen which was subjected to tensile loading. Straight slit and Vickers indentation were introduced as initial defects on each strip and cracking and delamination which were initiated around the defects were observed. In strips with slit, delamination was observed when introducing the slit. It was suggested that the delamination was caused by the residual stress accumulated during deposition. The growth of delamination was also observed during cyclic tension. In strips with indentation, complex cracking and delamination behavior was observed depending on the strip direction, which seemed to be attributed to the interactive effect of residual stress by deposition and external mechanical loading.

Developed Numerical Investigation into Residual Stress by Vickers Instrumented Indentation Technique

2015 ◽  
Vol 719-720 ◽  
pp. 38-45
Author(s):  
Yao Chen ◽  
Wei Wei Liu ◽  
Fei Qi
Keyword(s):  
Residual Stress ◽  
Stress State ◽  
Reference Material ◽  
Simple Analytical Model ◽  
Vickers Indentation ◽  
Instrumented Indentation ◽  
Residual Stress State ◽  
Nicraly Coating ◽  
Sprayed Coating ◽  
Plasma Sprayed

This research presents a developed simple analytical model to estimate the residual stress state and its magnitude in plasma sprayed coating based on the Vickers instrumented indentation results. By means of energy method during a Vickers indentation cycle, it is convenient to compute the stress state and its magnitude without any comparison of load-displacement curves of stress-free reference material. Computed results show that the residual stress in plasma sprayed Al-Si coating mainly ranges between 23-32 MPa in tensile state, which is consistent with the measurement of residual stress in as-sprayed NiCrAlY coating using neutron diffraction.

Effects of the Thermal Residual Stress Field on the Crack Propagation in Graded Alumina/Zirconia Ceramics

2005 ◽  
Vol 492-493 ◽  
pp. 177-182 ◽  
Author(s):  
P. Vena ◽  
D. Gastaldi ◽  
R. Contro
Keyword(s):  
Residual Stress ◽  
Stress Field ◽  
Crack Propagation ◽  
Threshold Stress ◽  
Numerical Approach ◽  
The Finite Element Method ◽  
Residual Stress Field ◽  
Zirconia Ceramics ◽  
Thermal Residual Stresses ◽  
Zirconia Composites

A numerical approach to study the crack propagation in symmetric step-wise graded Alumina/Zirconia composites subjected to a residual stress field is presented in this work. The finite element method is used to calculate the stress intensity factor for cracks developing from the surface and to determine the effects of the thermal residual stresses. The results show that a suitably conceived stacking sequence induces in the laminate a residual stress field able to provide increased toughness and reliability of the structure by making the crack propagation stable below a given threshold stress. Moreover a lower bound on stress, below which no crack propagation occurs, can be identified.

Residual surface stress by localized contact-creep

1997 ◽  
Vol 12 (1) ◽  
pp. 210-217 ◽  
Author(s):  
Sujanto Widjaja ◽  
Karl Jakus ◽  
Revti Atri ◽  
John E. Ritter ◽  
Sandeepan Bhattacharya
Keyword(s):  
Residual Stress ◽  
Surface Stress ◽  
Reasonable Agreement ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
Vickers Indentation ◽  
Element Analysis ◽  
Residual Surface Stress ◽  
Creep Flow ◽  
Elastic Rebound

When a ceramic material creeps under a localized stress and then cools under load, a portion of the creep flow stress is retained as a residual compressive stress due to elastic rebound being constrained by the creep zone. Localized contact-creep was used to generate residual compressive surface stress in soda-lime glass and two sintered aluminas. The Vickers indentation technique was used to measure the residual stress within the contact-creep area. Alumina with a higher elastic modulus than glass retained higher residual compressive surface stress. The results were in reasonable agreement with the predicted stress distribution given by finite element analysis.

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