scholarly journals On the Relation between the Values of Micro Vickers Hardness Number and the Fatigue Life of Mild Steel under Double Cumulative Stresses

1968 ◽  
Vol 34 (266) ◽  
pp. 1627-1634
Author(s):  
Shigemi SASAKI
Keyword(s):  
Fatigue Life ◽  
Mild Steel ◽  
Vickers Hardness ◽  
Vickers Hardness Number ◽  
Hardness Number

Contact Rigidity at Tool Shank of Turning Tools

1987 ◽  
Vol 109 (2) ◽  
pp. 169-172 ◽  
Author(s):  
E. Marui ◽  
S. Ema ◽  
S. Kato
Keyword(s):  
Experimental Investigation ◽  
Contact Area ◽  
Vickers Hardness ◽  
Flexural Rigidity ◽  
Vickers Hardness Number ◽  
Empirical Expressions ◽  
Contact Rigidity ◽  
Hardness Number ◽  
Tool Shank

This paper presents an experimental investigation of the contact rigidity between a turning tool shank and tool post. The contact rigidity is influenced by the flexural rigidity of tool shank, contact area in the tool shank and the Vickers hardness number of the shank material. The effects of these parameters on the contact rigidity are estimated by simple empirical expressions.

Microstructural Characterization and Properties of Sn-Ag-Cu (SAC) Compound Induced by Zn Alloying

2017 ◽  
Vol 16 ◽  
pp. 33-36 ◽  
Author(s):  
Stewart M. Go Roa ◽  
Eduardo Magdaluyo Jr. ◽  
Wojciech Gierlotka
Keyword(s):  
Structural Analysis ◽  
Vickers Hardness ◽  
Microstructural Characterization ◽  
Minimal Amount ◽  
Microstructural Properties ◽  
Constant Composition ◽  
Vickers Hardness Number ◽  
Hardness Number ◽  
Fine Microstructure

The microstructural properties and intermetallic (IMC) formation of Sn-Ag-Cu (SAC) through varying amounts of zinc were examined in this study while having tin held at constant composition. Samples were prepared and heated in a furnace for 168 hours to achieve complete solidification and homogenization. Results showed relatively fine microstructure primarily containing Sn dendrites, eutectic, and pro-eutectic phases. Microstructures for each alloy was similar for which majority of them formed copper-based IMCs and Sn dendrites. The alloy (0.7Sn-0.15Ag-0.1Cu-0.05Zn) containing minimal amount of zinc with high amount of Ag resulted to high Vickers hardness number. Structural analysis showed that these group of alloys composed mainly of β-Sn, Cu6Sn5, and Ag3Sn.

scholarly journals Evaluation of Vickers Hardness Number of Al-Si Alloy Under Heat Treated Conditions

2021 ◽  
Vol 10 (6) ◽  
pp. 222-227
Author(s):  
Jayasheel Kumar K A ◽  
◽  
C M Ramesha ◽  
Keyword(s):  
Heat Treatment ◽  
Vickers Hardness ◽  
Precipitation Hardening ◽  
Heat Treatment Condition ◽  
Vickers Hardness Number ◽  
Hardness Tester ◽  
Hardness Number ◽  
Heat Treated ◽  
Hardness Property ◽  
Property Assessment

The paper deal with the hardness property assessment of various Al-Si alloys under heat treated conditions. The tested specimens have the compositions of Si with percentages such as 12 18 and 24. The fabrication of the selected composition is carried out by melting the material to the melting temperature of around 800°C. The material is subjected to solutionised heat treatment for 3 hours at 500°C, 520°C and 535°C and quenched in water. Further aging is carried out at 155°C for 2 hours, 5 hours and 8 hours respectively for 500°C, 520°C and 535°C of solution heat treatment condition. The hardness property is evaluated using Vickers Hardness tester as per the standards of ASTM- E92. Thorough comparison of Vickers hardness number is performed among the as- cast and various heat treated environment. Desirable properties of alloy are observed at 520°C solutionised heat treatment & 5 hours of precipitation hardening at 155°C for 18% of Silicon composition. The hardness value decreases due to the increase in percentage of silicon and the values are observed.

Effects of gamma radiation on poly(methyl methacrylate)/single-wall nanotube composites

2002 ◽  
Vol 17 (10) ◽  
pp. 2507-2513 ◽  
Author(s):  
P. A. O'Rourke Muisener ◽  
L. Clayton ◽  
J. D'Angelo ◽  
J. P. Harmon ◽  
A. K. Sikder ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Methyl Methacrylate ◽  
Vickers Hardness ◽  
Radiation Effects ◽  
Pure Pmma ◽  
Vickers Hardness Number ◽  
Poly Methyl Methacrylate ◽  
Hardness Number ◽  
The Matrix ◽  
Nanotube Composites

Single-wall carbon nanotube (SWNT)/poly(methyl methacrylate) (PMMA) composites were fabricated and exposed to ionizing radiation for a total dose of 5.9 Mrads. Neat nanotube paper and pure PMMA were also exposed for comparison, and nonirradiated samples served as controls. A concentration of 0.26 wt% SWNT increased the glass transition temperature (Tg), the Vickers hardness number, and modulus of the matrix. Irradiation of the composite did not significantly change the Tg, the Vickers hardness number, or the modulus; however, the real and imaginary parts of the complex permittivity increased after irradiation. The dielectric properties were found to be more labile to radiation effects than mechanical properties.

A Study of Nozzles in Pressure Vessels under Pressure Fatigue Loading

1967 ◽  
Vol 182 (1) ◽  
pp. 657-684 ◽  
Author(s):  
J. Spence ◽  
W. B. Carlson
Keyword(s):  
Fatigue Life ◽  
Mild Steel ◽  
Pressure Vessel ◽  
Special Interest ◽  
Maximum Stress ◽  
Fatigue Loading ◽  
Fatigue Tests ◽  
Pressure Vessels ◽  
Full Size

Nozzles in cylindrical vessels have been of special interest to designers for some time and have offered a field of activity for many research workers. This paper presents some static and fatigue tests on five designs of full size pressure vessel nozzles manufactured in two materials. Supporting and other published work is reviewed showing that on the basis of the same maximum stress mild steel vessels give the same fatigue life as low alloy vessels. When compared on the basis of current codes it is shown that mild steel vessels may have five to ten times the fatigue life of low alloy vessels unless special precautions are taken.

scholarly journals Analysis Of Load Variations On ST 60 Steel Using Vickers Method

2020 ◽  
Vol 5 (1) ◽  
pp. 231-235
Author(s):  
Hidayat Hidayat
Keyword(s):  
Mechanical Properties ◽  
Mild Steel ◽  
Vickers Hardness ◽  
Testing Methods ◽  
Load Variations ◽  
Load Variation ◽  
Average Hardness ◽  
Equipment Component ◽  
Diamond Pyramid

The use of metal in the industrial world, especially ST60 Steel, is a very vital need, this can be seen from the increasing number of machine or equipment components or construction parts made of steel. Hardness is one of the mechanical properties that is often used as a guide in selecting materials for an equipment component. To find out the hardness price of a material, various testing methods can be used, including the Vickers method, which is tested by applying a force to the indented diamond pyramid against the material for which the hardness value is determined. The amount of hardness value is determined by the magnitude of the loading force divided by the area of indentation. In this study, what was investigated was the effect of force on the hardness of the Vickers method. The results showed that the load variation had little effect on the results of the Vickers hardness value, especially for high loads (100 Kgf). The average hardness value for the mild steel being tested is 163 HV and 168 HV, the highest hardness value is 174 HV and the lowest hardness value is 156 HV, so that a tolerance of ± 10 HV commonly used in the Vickers test is sufficient.Keywords: Hardness, ST 60 Steel , Loading Variations, Vickers Test

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