HATFIELD, PA– Laboratory Testing Inc. (LTI), materials testing, nondestructive testing and metrology lab, recently introduced fatigue crack growth testing as one of its mechanical testing services. LTI’s lab performs fatigue crack growth testing, also called da/dN testing, according to the ASTM E647 standard. Constant load, increasing, decreasing and constant delta K, and constant Kmax control methods are offered. The test can be performed at temperatures between -250°F and 400°F and at loads running from 50 lbs. to 55, 000 lbs.
The fatigue crack growth test generates a curve displaying the crack growth rate as the cyclic stress intensity factor (delta K) is varied. The test results also provide the data points and a da/dN-dK plot. Additionally, LTI also has the capability of providing customers with threshold and Paris Law values. Laboratory Testing works with customers to provide adaptable testing for specific testing and engineering needs.