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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The ASTM E axial load fatigue test is used to determine the effect of variations in material, geometry, surface condition, stress, etc.
The results may also be used as a guide for the selection of metallic materials for service under conditions of repeated direct stress. The varying stress amplitude, as determined by a suitable dynamic veri?
ASTM E Load Controlled Constant Amplitude Fatigue Tests of Metals
ASTM E conducts axial fatigue tests to obtain the fatigue strength of metallic materials in the fatigue regime where the strains are predominately elastic both upon initial loading and throughout the test. Historical Version s – view previous versions of standard. Since however, the environment can greatly in? Also, Refsalthough they pertain to straincontrolled testing, may prove of interest since they deal with sheet specimens approximately 0. NOTE 2—Measurements of dimensions presume smooth surface?
One exception may be where these parameters are under study.
Record the load at the time of failure. This practice is not intended for application in axial fatigue tests of components or parts.
ASTM E466 Load Controlled Constant Amplitude Fatigue Tests of Metals
Testing Procedure Place the specimen securely in the grips of the testing machine. Originally approved in Take care to adjust the specimen symmetrically to distribute the load uniformly over the cross section. 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. In the typical regime of 10?
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Proper machining techniques prevent the introduction of stress risers or crack initiation sites.
ASTM E466 – Force Controller Constant Amplitude Axial Fatigue Testing of Metallic Materials
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. This knowledge and care provides the most meaningful and best possible high cycle fatigue life results. We are confident that we have what you are looking for. Because of this, a circular cross section may be preferred if material form lends itself to this con? However, the design should meet certain general criteria outlined below: The following documents, although not directly referenced in the text, are considered important enough to be listed in this practice: Machining methods and techniques can strongly influence the fatigue life of a material.
In view of this, no maximum ratio of area grip to test section should apply. 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.
For tests run in compression, the length of the test section should be approximately two times the test section diameter to minimize buckling. Touchstone is experienced in the performance of fatigue testing in almost every material system and at a wide variety of temperatures from cryogenic to over ?
The area restrictions should be the astn as for the specimen described in 5. For rectangular cross section specimens, alignment should be checked by placing longitudinal strain gages on either side of the trial specimen at the minimum width location.
One set of strain gages should be placed at the center of the gage length to detect misalignment that causes relative rotation of the specimen ends about axes perpendicular to the specimen axis. As a cautionary note, should localized yielding occur, signi?
Fillet undercutting can be readily determined by inspection. The value of 1. Since specimen preparation can strongly in? Ra, in the longitudinal direction. Permission rights to photocopy the standard 4e66 also be secured from the ASTM website www. The ratio of specimen test section width to thickness should be between two and six, and the reduced area should preferably be between 0.