Hardness Testing of Vulcanized Rubber. V. Investigation of the Ball Indentation Test. Part 3. Condition of the Rubber Surface

1948 ◽  
Vol 21 (1) ◽  
pp. 262-270
Author(s):  
E. H. Dock ◽  
J. R. Scott
Keyword(s):  
Indentation Test ◽  
Hardness Testing ◽  
Test Part ◽  
Vulcanized Rubber ◽  
Ball Indentation ◽  
Rubber Surface ◽  
Ball Indentation Test

Ball-indentation test technique for evaluating thermal and creep damage of modified 9Cr-1Mo steel

2010 ◽  
Vol 63 (2-3) ◽  
pp. 431-436 ◽  
Author(s):  
V. Karthik ◽  
K. Laha ◽  
K. S. Chandravathi ◽  
P. Parameswaran ◽  
K. V. Kasiviswanathan ◽  
...  
Keyword(s):  
Indentation Test ◽  
Creep Damage ◽  
Test Technique ◽  
Ball Indentation ◽  
Ball Indentation Test

Evaluation of Local Tensile Properties of Bi-Metallic Weld Joints by Small Tensile and Ball Indentation Tests

2007 ◽  
Vol 353-358 ◽  
pp. 2073-2076
Author(s):  
Jin Won Kim ◽  
Jong Sun Park ◽  
Jong Sung Kim ◽  
Tae Eun Jin
Keyword(s):  
Weld Metal ◽  
Tensile Properties ◽  
Ferritic Steel ◽  
Indentation Test ◽  
Ultimate Tensile Stress ◽  
Base Metals ◽  
Weld Joints ◽  
Ball Indentation ◽  
Indentation Tests ◽  
Ball Indentation Test

This study performed tensile test using small-size flat specimen and ball indentation test at room temperature to characterize the local tensile properties of bi-metallic weld joints. The weld specimens used were fabricated by joining between SA508 Gr.3 ferritic steel and Type 316 stainless steel with Alloy 82 buttering on the ferritic steel side and Alloy 82/182 weld metal. The test results showed that yield stress (YS) of weld metal was slightly higher than that of Type 316 and smaller than that of SA508 Gr.3, and ultimate tensile stress (UTS) of weld metal was similar as those of Type 316 and SA508 Gr.3 base metals. Also, the values of YS and UTS of buttering layer (Alloy 82) were nearly same as those of weld metal. Heat-affected-zones (HAZs) showed higher YS and UTS values compared to their base metals. Especially, the strengths of SA508 Gr.3 were significantly higher than those of surrounding materials. Also, it was known that the ball indentation test reasonably measured the local YS and UTS of bi-metallic weld joints.

In-Situ Damage Evaluation Using Ball Indentation Test Method

2010 ◽  
Author(s):  
Raghu V. Prakash
Keyword(s):  
True Strain ◽  
Base Material ◽  
Indentation Test ◽  
Test Method ◽  
Fatigue Properties ◽  
Invasive Test ◽  
Ball Indentation ◽  
Loading And Unloading ◽  
Ball Indentation Test

Automated ball indentation is a semi-invasive test method that is gaining importance as a field test method in the recent times. Based on the few cycles of loading and unloading, and corresponding load, deflection characteristics, it is possible to estimate the true stress-true strain information of a material. In the present work, ball indentation has been used to evaluate the static and fatigue properties of base material as well as material subjected to different types of damage, such as fatigue, weldment etc. The tensile properties and fatigue properties were found to be affected by the prior damage history.

Testing Techniques for Mechanical Characterization of Nanostructured Materials

2003 ◽  
Vol 791 ◽  
Author(s):  
Carl C. Koch ◽  
Ronald O. Scattergood ◽  
K. Linga Murty ◽  
Ramesh K. Guduru ◽  
Gopinath Trichy ◽  
...  
Keyword(s):  
Indentation Test ◽  
Small Sample ◽  
Small Samples ◽  
Punch Test ◽  
Ball Indentation ◽  
Shear Punch Test ◽  
Testing Techniques ◽  
Ball Indentation Test ◽  
Small Sample Sizes

ABSTRACTTesting methods are reviewed that can be applied to the small sample sizes which result from many of the processing routes for preparation of nanocrystalline materials. These include the measurement of elastic properties on small samples; hardness, with emphasis on nanoindentation methods; the miniaturized disk bend test (MDBT); the automated ball indentation test (ABI); the shear punch test; and the use of subsize compression and tensile samples.

Rationalization of the Hardness Testing of Rubber

1936 ◽  
Vol 9 (1) ◽  
pp. 83-94
Author(s):  
J. R. Scott
Keyword(s):  
Theoretical Basis ◽  
Practical Significance ◽  
Reverse Direction ◽  
Hardness Testing ◽  
Dead Weight ◽  
Rubber Industry ◽  
Hardness Tester ◽  
Vulcanized Rubber ◽  
Rubber Surface ◽  
Compression Characteristics

Abstract The object of this paper is to draw attention to the present unsatisfactory state of the hardness testing of vulcanized rubber and the need for standardization of this test, and also to present some results of an investigation into the theoretical basis of hardness testing and the practical significance of hardness measurements. In this paper the word “hardness” will be used in the sense generally accepted in the rubber industry, that is, to denote resistance to indentation. The most commonly used types of hardness tester measure hardness in terms of the depth of the indentation made by a rigid ball or blunt pin pressed into the rubber by either a dead weight or a spring. The reading given by such an instrument, usually termed the hardness number, must depend on several variable factors, namely (1) the dimensions of the ball or pin; (2) the weight used to press it into the rubber, or the compression characteristics of the spring in the case of spring-loaded instruments; (3) the direction of the scale of the instrument, i. e., whether the reading increases with the depth of indentation, as in the Pusey-Jones Plastometer, or in the reverse direction, as in the Durometer; (4) the units in which the indentation is measured, i. e., whether in 100ths of a millimeter, 1000ths of an inch, or arbitrary units. In addition to these factors relating to the instrument, the reading must also depend on the dimensions of the rubber test-piece, especially its thickness, the nature of the rubber surface, and the period for which the ball or plunger is pressed on to the rubber before the reading is taken.

Sign in / Sign up

Export Citation Format

Share Document