ASTM C1834-16 Test for Slow Crack Growth Parameters of Advanced Ceramics by Constant Stress Flexural Testing at Elevated Temperatures
ASTM C1834-16 is used to determine the slow crack growth (SCG) parameters of advanced ceramics in a given test environment at elevated temperatures in which the time-to-failure of four-point-1/4 point flexural test specimens is determined as a function of different levels of constant applied stress.
The life of many ceramic components is limited by the subcritical growth of cracks. ASTM C1834-16 is used to determine the relative slow crack growth susceptibility of ceramic materials under specified environments at elevated temperatures. In addition, this method is used to determine the effects of processing variables and composition on slow crack growth as well as on the strength of materials. The information obtained from this test method is used for material development, quality control, characterization, design code or model verification, and limited design data generation purposes. This test method uses a 4-point-1/4 point flexural test modeand is primarily used to test monolithic advanced ceramics that are macroscopically homogeneous and isotropic. It is also applicable to whisker- or particle-reinforced ceramics and discontinuous fiber-reinforced composite ceramics that exhibit macroscopically homogeneous behavior.
The test is conducted under a predetermined test environment at elevated temperatures. A four-point flexure test is used in this standard. In this method, a sample is placed on two supporting structures, and the force is applied on the specimen from above through two loading pins. These two loadings pins are lowered from above at a constant rate until sample failure. Each test specimen is carefully placed into the test fixture to avoid damage and contamination and to ensure alignment of the specimen with the fixture. Test Fixture/Specimen Assembly then is mounted into the Test Machine. The data acquisition is initiated. The force is applied to the test specimen. Time-measuring devices record the time to failure. If failure does not occur within the specific time agreed upon in the test program, it is recorded as a run-out. A force versus time curve is recorded for each test to check the requirement of force variation of testing machines. Fragments are collected. They are cleaned and stored in a protective container for further analysis, including fractography. Fractographic analysis of fractured test specimens is employed to ensure that all the fracture origins are from the same population and to characterize the types, locations, and sizes of fracture origins as well as the flaw extensions due to slow crack growth.
The types and dimensions of rectangular beam specimens as described in Test Method C1161 should be used in this test method.
The flexural strength is calculated according to the formula for the strength of a beam in four-point 1⁄4 point flexure.
Time to failure of flexure test specimens is determined as a function of constant applied stress in a given environment at ambient temperature.
The Fatigue curve and the Slow Crack Growth Parameters n and D are determined.
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 is a standard test method for the analysis of sulfochromate etches solution 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
You share material and testing requirements with us
We ensure your sample pick-up in an ensured manner
We deliver test report to your inbox
Just share your testing requirements and leave the rest on us!