ASTM-G32 2009

$44.96

G32-09 Standard Test Method for Cavitation Erosion Using Vibratory Apparatus

Published By	Publication Date	Number of Pages
ASTM	2009	16

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Category: ASTM

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Description

ASTM G32-09

Historical Standard: Standard Test Method for Cavitation Erosion Using Vibratory Apparatus

ASTM G32

Scope

1.1 This test method covers the production of cavitation damage on the face of a specimen vibrated at high frequency while immersed in a liquid. The vibration induces the formation and collapse of cavities in the liquid, and the collapsing cavities produce the damage to and erosion (material loss) of the specimen.

1.2 Although the mechanism for generating fluid cavitation in this method differs from that occurring in flowing systems and hydraulic machines (see 5.1), the nature of the material damage mechanism is believed to be basically similar. The method therefore offers a small-scale, relatively simple and controllable test that can be used to compare the cavitation erosion resistance of different materials, to study in detail the nature and progress of damage in a given material, or—by varying some of the test conditions—to study the effect of test variables on the damage produced.

1.3 This test method specifies standard test conditions covering the diameter, vibratory amplitude and frequency of the specimen, as well as the test liquid and its container. It permits deviations from some of these conditions if properly documented, that may be appropriate for some purposes. It gives guidance on setting up a suitable apparatus and covers test and reporting procedures and precautions to be taken. It also specifies standard reference materials that must be used to verify the operation of the facility and to define the normalized erosion resistance of other test materials.

1.4 A history of this test method is given in Appendix X3, followed by a comprehensive bibliography.

1.5 The values stated in SI units are to be regarded as standard. The inch-pound units given in parentheses are for information only.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific safety warning information, see 6.1, 10.3, and 10.6.1.

Keywords

cavitation; cavitation erosion; erosion by liquids; erosion-corrosion; erosion of solids; erosion resistance; erosion test; vibratory cavitation; Cavitation erosion/corrosion; Corrosion–cavitation erosion/corrosion; Diesel engine cylinder liners; Dynamometer testing; Erosion; Generator materials–turbine; Hydrofoils; Metals and metallic materials; Metals (for surgical implants); Pressure testing; Propellers; Pumps; Shipbuilding materials (general); Testing methods–surgical implants; Vibration test

ICS Code

ICS Number Code 77.060 (Corrosion of metals)

DOI: 10.1520/G0032-09

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
3	Summary of Test Method Significance and Use Apparatus
4	FIG. 1 FIG. 2 FIG. 3
5	Test Specimens FIG. 4
6	Calibration TABLE 1 FIG. 5
7	Test Conditions FIG. 6 TABLE 2
8	Procedure
9	Calculation or Interpretation of Results FIG. 7
10	Report TABLE 3
11	Precision and Bias Keywords
12	X1. AMPLITUDE MEASUREMENT AND CALIBRATION X1.1 X1.2 Filar Microscope X1.3 Dial Indicator X1.4 Noncontacting Probes X1.5 Strain Gages X1.6 Accelerometers X2. RECOMMENDATIONS FOR SPECIMEN THREADS AND PRESTRESSING TORQUE X2.1 Basic Considerations X2.2 Thread Selection
13	X2.3 Relation Between Tightening Torque and Preload X2.4 Prestressing Guidelines TABLE X2.1
14	X3. RATIONALE X3.1 Background and History TABLE X2.2
15	X3.2 Applications of Vibratory Apparatus X3.3 Revisions to This Test Method REFERENCES