ASTM E82 test method covers the back-reflection Laue procedure for determining the orientation of a metal crystal. The back-reflection Laue method for determining crystal orientation may be applied to micro grains (0.5-mm diameter or larger) within polycrystalline aggregates, as well as to single crystals of any size. The method is described for cubic crystals. It can be applied equally well to hexagonal, tetragonal, or orthorhombic crystals.
ASTM E82 Test Method for Determining the Orientation of a Metal Crystal
What is ASTM E82?
ASTM E82 Sample Preparation Guide
For ASTM E82 testing, the test specimen may be of any convenient size or shape. Normally, the orientation is determined with reference to a prepared surface and a line on this surface. Using an adjustable fixed holder that can later be mounted on a saw, lathe, or other machine, a single crystal material can be moved to a preferred orientation and subsequently sectioned, ground, or otherwise processed.
What is the Testing Procedure and Requirement of ASTM E82?
In the ASTM E82 test method, the arrangement of the apparatus is similar to that of the transmission Laue method for crystal structure determination except that the photographic film is located between the X-ray source and the specimen. The beam of white X-radiation passes through a pinhole system, and a hole in the photographic film strikes the crystal and is diffracted back onto the film. Dark spots, which represent X-ray beams “reflected” by the atomic planes within the specimen, appear on the developed film. The atomic planes these spots represent are identified by crystallographic procedures, and the orientation of the metal crystal is determined.
Analysis Result and Interpretation
ASTM E82 test method covers the back-reflection Laue procedure for determining the orientation of a metal crystal. The following data are used in ASTM E82 testing:
- X-Ray Tube – The tube voltage shall be near 50kVp.
- Back-Reflection Laue X-Ray Camera – The X-ray camera shall have a pinhole system about 6cm in length with openings of 1⁄4 to 1 mm, a flat, light-tight film holder (the hole in the center of the film should be as small as possible, preferably about 1⁄8 in. (3.2 mm) in diameter), a specimen holder, and means for setting the crystal-to-film distance at 3.00 cm.
FAQ
Where can I get the astm e82 tested?
You can share your astm e82 testing requirements with MaTestLab. MaTestLab has a vast network of material testing laboratories, spread across the USA and Canada. We support your all material testing needs ranging from specific astm e82 test to various testing techniques.
How much do I need to pay for the astm e82 test?
Please contact us for a detailed quote for your astm e82 testing needs. Cost incurred to carry out different astm e82 testing methodology depends on the type of raw material; number of samples, coupons, or specimens; test conditions, turn around time etc. Costs of some ASTM testing methods start from $100 and the final value depends upon the factors listed above. Please contact us for the best and latest prices.
How many samples are required for astm e82?
The required number of samples or specimens should comply with the procedure given in the astm e82 standard. However, the MaTestLab operations team can assist you for your special requirements once you share your testing details with us.
How much discount can I get on the astm e82 test?
MaTestLab has a vast testing laboratory network, hence we bring you the best testing facilities in a cost-effective way. We offer considerable discounts (15-20%) to our returning customers based on test volume and frequency.
How many days will it take to complete the astm e82 test?
The turnaround time for astm e82 test methodology depends upon the test procedure mentioned in the standard test document. However, we at MaTestLab understand your research requirements and hence try to get your test completed within the least possible time.
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