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.
|Published (Last):||13 June 2014|
|PDF File Size:||1.35 Mb|
|ePub File Size:||8.32 Mb|
|Price:||Free* [*Free Regsitration Required]|
For example, specimen alignment is of utmost importance and the procedure outlined in Practice E would be advantageous. By means of our fatigue testing expertise and modular product design, we will help find the solution that is right for you.
However, regardless of the nature of the forcing function, it should be reported sine, ramp, saw tooth, etc.
Specimens can be round or flat. To ensure test section failure, the grip asmt area should be at least 1. Improper methods of preparation can greatly bias the test results. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Otherwise, the sections may be either of two types: For specimens that are less than 0.
ASTM E466 – Force Controller Constant Amplitude Axial Fatigue Testing of Metallic Materials
The area restrictions should be the same as for the specimen described in 5. Failure may be de? This avoids complications that prevent the true strength of the material from being evaluated.
The varying stress amplitude, as determined by a suitable dynamic veri? 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. In view of this fact, the method of preparation should be agreed upon prior to the beginning of the test program by both the originator and the user of the fatigue data to be generated.
The reduced section length should be greater than three times the minimum test section diameter.
ASTM E Load Controlled Constant Amplitude Fatigue Tests of Metals
Machining methods and techniques can strongly influence the fatigue life of a material. The lower the bending stresses strainsthe more repeatable the test results will be from specimen to specimen. 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 finish, and so forth.
Readers are referred to Ref 1 should this occur.
Place the specimen securely in the grips of the testing machine. However, the design should meet certain general criteria outlined below: In the case of surfaces that are not smooth, due to the fact that some surface treatment or condition is being studied, the dimensions should be measured as above and the average, maximum, and minimum values reported.
The test section length should be approximately two to three times the test section diameter. Take care to properly align the specimen. Since specimen preparation can strongly in? 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 ambient test temperatures and within the frequency regime mentioned.
As a cautionary note, should localized yielding occur, signi? 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? Touchstone Research Laboratory, Ltd. Astn our test engineers a call today for help configuring aetm best test machine and accessories according to ASTM E Every effort should be made to prevent e646 occurrence of misalignment, either due to twist rotation of the gripsor to a displacement in their axes of symmetry.
Thus, when embarking on a program of this nature it is essential to define and maintain consistency a priori, as many variables as reasonably possible, with as much economy as prudent.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
The ASTM E axial load fatigue test is used to determine the effect of variations in material, geometry, surface condition, stress, etc. A number in parentheses indicates the year of asrm reapproval.
All material variables, testing information, and procedures used should be reported so that correlation and reproducibility of results may be attempted in a fashion that is considered reasonably good current test practice. ASTM E covers axial force controlled fatigue tests of metallic materials f466 the fatigue regime where strains are predominately elastic, both at initial loading and throughout the test.
ASTM E466 Load Controlled Constant Amplitude Fatigue Tests of Metals
The results may aastm be used as a guide for the selection of metallic materials for service under conditions of repeated direct stress. The ratio of specimen test section width to thickness should be between two and six, and the reduced area should preferably be between 0.
Static and fatigue forces up to 25 wstm 5, lbf Frequency ratings up to Hz Servohydraulic Small, portable footprint. The test may also be used as a guide to the selection of metallic materials for service under conditions of repeated direct stress.