ASTM E466 PDF
Download scientific diagram | Typical sample for fatigue test according to ASTM E Standard. from publication: Effect of Hot Isostatic Pressure treatment on. ASTM E , Standard practice for conducting force controlled ASTM E , Standard terminology relating to fatigue and fracture testing 1). ASTM E covers axial force controlled fatigue tests of metallic materials in the fatigue regime where strains are predominately elastic, both at initial loading.
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Place the specimen securely in the grips of the testing machine.
ASTM E466 Load Controlled Constant Amplitude Fatigue Tests of Metals
This practice is limited to the fatigue testing of axial unnotched and notched specimens subjected to a constant amplitude, periodic forcing function in air at room temperature.
Surfaces intended to be parallel and straight should be in a manner consistent with 8. Link to Active This link will always route to the current Active version of the standard.
As a cautionary note, should localized yielding occur, signi? One exception r466 be where these parameters are under study. The storage medium should generally be removed before testing using appropriate solvents, if necessary, without adverse effects upon the life of the specimens.
Improper methods of preparation can greatly bias the test results. Otherwise, the same dimensional relationships should apply, as in the case of the specimens described in 5.
ASTM E Load Controlled Constant Amplitude Fatigue Tests of Metals
The trial specimen should be rotated about its longitudinal axis, installed and checked in both orientations within the? Take care to properly align the specimen. Take care to adjust the specimen symmetrically to distribute the load uniformly over the cross section. Regardless of the machining, grinding, or e466 method used, the?
This avoids complications that prevent the true strength of the material from being evaluated.
Readers are referred to Ref 1 should this occur. The results may also be used as a guide for the selection of metallic materials for service under conditions of repeated direct stress. In the typical regime of 10? To do so would require the control or balance of what are often deemed nuisance variables; for example, hardness, cleanliness, grain size, composition, directionality, surface residual stress, surface?
Qstm area restrictions should be the same as for the specimen described in 5. The acceptable ratio of the areas test section to grip section to ensure a test section failure is dependent on the specimen gripping method. Every effort should be made to prevent the occurrence of misalignment, either due to twist rotation of the gripsor to a displacement in their axes of symmetry.
ASTM E466 – Force Controller Constant Amplitude Axial Fatigue Testing of Metallic Materials
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. We are confident that we have aetm you are looking for. The size of the gripped end relative to the gage section, and the blend radius from gage section into the grip section, may cause premature failure particularly if fretting occurs in the grip section or if the radius is too small.
Static and fatigue forces up to 50 kN 11, lbf Frequency ratings up to 75 Hz R466, all electric actuator for clean test conditions Lower purchase, operating, and mantenance costs than hydraulic equivalents. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. The ratio of specimen test section width to thickness should be between two and six, asstm the reduced area should preferably be between 0.
Specimens should be cleaned prior to testing with solvent s non-injurious and non-detrimental to the mechanical properties of the material in order to remove any surface oil? However, the design should meet certain general criteria outlined below: Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Have a question about conducting the test for this standard?
ee466 Historical Version s – view previous versions of standard. A caveat is given regarding the gage section with astmm edges that is, square or rectangular cross section since these are inherent weaknesses because the slip of the grains at sharp edges is not con?
Threaded end specimens may prove difficult to align and failure often initiates at these stress concentrations when testing in the life regime of interest in this practice. This practice is not intended for application in axial fatigue tests of components or parts. Since however, the environment can greatly in? For most conventional grips, good alignment must come about from very careful attention to design detail.
Specimens can be round or flat. Obvious abnormalities, such as cracks, machining marks, gouges, undercuts, and so forth, are not acceptable.
Continue aastm cycles to failure. This knowledge and care provides the most meaningful and best possible high cycle fatigue life results. Permission rights to photocopy the standard may also be secured from the ASTM website www. Failure may be de? To ensure test section failure, the grip cross-sectional area should be at least 1. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Originally approved in However, regardless of the nature of the forcing function, it should be reported sine, ramp, saw tooth, etc. The test section length should be approximately two to three times the test section diameter.
The results may also be used as a guide for the selection of metallic materials for service under conditions of repeated direct stress.
In view of this, no maximum asmt of area grip to test section should apply. The test may also be used as a guide to the selection of metallic materials for service under conditions of repeated direct stress. It is beyond the scope of Practice E to extrapolate beyond this range or to extend this assumption to other materials systems that may be viscoelastic or viscoplastic at asgm test temperatures and within the frequency regime mentioned.