ASTM E82 Test Method for Determining the Orientation of a Metal Crystal
Metals and other materials are not always isotropic in their physical properties. Therefore, it is desirable or necessar y to determine the orientation of a single crystal undergoing tests to ascertain the relation of any property to different directions in the material. ASTM E82 test method can be used commercially as a quality control test in production situations where the desired orientation, within prescribed limits, is required.... Read More
Average 30% Cost Savings
100% Confidentiality Guarantee
Free, No-obligation Consultation
100% Customer Satisfaction
TRUSTED BY ENGINEERS FROM
ASTM E82 Test Method for Determining the Orientation of a Metal Crystal
Metals and other materials are not always isotropic in their physical properties. Therefore, it is desirable or necessary to determine the orientation of a single crystal undergoing tests to ascertain the relation of any property to different directions in the material. ASTM E82 test method can be used commercially as a quality control test in production situations where the desired orientation, within prescribed limits, is required.
Scope:
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.
Test Procedure:
In 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.
Figure 1: Laue method for crystal structure determination
Figure 1: Laue method for crystal structure determination
Specimen size:
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.
With the use of an adjustable fixed holder that can later be mounted on a saw, lathe, or other machines, a single crystal material can be moved to a preferred orientation, and subsequently sectioned, ground, or processed otherwise.
Data
The following data is 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.
Conclusion:
ASTM E82 test method covers the back-reflection Laue procedure for determining the orientation of a metal crystal.
ASTM E572 test method covers the analysis of stainless and alloy steels by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). It provides rapid, multi-element determinations with sufficient accuracy to assure product quality.
The ASTM D2674 test is a standard test method for the analysis of sulfochromate etch solutions used in the surface preparation of aluminum. The ASTM D2674 standard specifies a method for determining the efficacy of an etchant used to prepare the surface of aluminum alloys for subsequent adhesive bonding.
An immunological method for quantization of Hevea Natural Rubber (HNRL) proteins using rabbit anti-HNRL serum. Rabbits immunized with HNRL proteins react to the majority of the proteins present, and their sera have the capability to detect most if not all the proteins in HNRL.
ASTM G65 measures the resistance of metallic materials to abrasion using the dry sand/rubber wheel apparatus. The quality, durability, and toughness of the sample are determined using this test. Metallic materials are ranked in their resistance to scratching abrasion under a controlled environment.
ASTM E2141 test methods provide accelerated aging and monitoring of the performance of time-dependent electrochromic devices (ECD) integrated in insulating glass units (IGU). This test helps to understand the relative serviceability of electrochromic glazings applied on ECD.
ASTM C724 test method is used in analyzing the quality and ease of maintenance of a ceramic decoration on architectural-type glass. This test method is useful in the acknowledgment of technical standards.
Send us a request
Process for testing
STEP 01
You share material and testing requirements with us
STEP 02
You ship your sample to us or arrange for us to pick it up.
STEP 03
We deliver the test report to your email.
Just share your testing requirements and leave the rest on us!
Free, no-obligation consultation
Guaranteed confidentiality
Quick turnaround time
Hassle-free process
Let us combine our capabilities to achieve success!!