ASTM E139 Creep, Creep Rupture and, Stress Rupture Test of Metallic Materials
ASTM E139 test method involves creep and rupture tests for metallic materials. The creep test measures the load-carrying capacity of the material up to limited deformation. The rupture test measures load carrying capacity as a function of time. These tests complement each other for determining the load-carrying capacity of metallic materials.
ASTM E139 test method is used to estimate the amount of deformation as a function of time in the creep test and the measurement of the time required to form a fracture when sufficient force is present for materials when under constant tensile forces at a constant temperature in the rupture test. It also includes the essential requirements for testing equipment.
ASTM E139 test is an eight-step method, where initially all cross-sectional areas of the test specimen are measured. Then the original length is measured. The specimen needs to be washed carefully at reduced sections and the parts of the specimen which contact the grips in clean alcohol, acetone, or other suitable solvents that will not affect the metal being tested. Then a thermocouple is attached to the specimen to control the temperature during the test. Then the specimen is connected to the machine. Care must be taken while connecting the specimen to the machine. During the test, strain is to be measured for the creep or creep rupture test. Then force is applied to the specimen in such a manner that shock forces or excess forces due to inertia are avoided. The force may be applied in increments with strain readings taken between increments to provide stress-strain data for the application of the force. Then elongation and reduction in the area are measured.
Video 01: Creep test
The size and shape of test specimens shall be based primarily on the requirements necessary to obtain representative samples of the material being investigated or as required by the specification.
Figure 01: Method of calculating elongation when the gauge length is marked on the reduced section of the specimen
Figure 02: Method of calculating elongation when the original gauge length includes fillets, shoulders, threads, etc.
ASTM E139 test method is used to estimate the amount of deformation as a function of time in the creep test and the measurement of the time required to form a fracture when sufficient force is present for materials when under constant tensile forces at a constant temperature in the rupture test.
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
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!
Free, no-obligation consultation
Quick turnaround time
Let us combine our capabilities to achieve success!!