Manufacturing of test specimens for destructive tests from aerospace grade materials
- A test coupon or simply a coupon is a small sample of the material used to obtain data of certain properties after testing. It is also commonly referred to as a specimen or simply a sample.
- Salloytech is the one-stop source for high-quality test coupons, specimens, and samples machined from difficult-to-machine aerospace grade materials, such as nickel and cobalt base superalloys (wrought, cast - including single-cry-stal materials), titanium, and hardened steel.
Our experience includes manufacturing the specimens:
Our Advantages
Quality Assurance
- We maintain Quality Management System in accordance with AS9100 standard by qualified staff of internal auditors
Manufacturing processes
- Using modern machining, loss and additive methods we ensure optimum price / performance ratio while meeting all requirements of the project.
On time Delivery
- Reliable processing from the design phase to the delivery to Customer through the Just-in-Time method.
Specimens manufactured by our developed technologies allow to:
- Obtain better test results for process qualification
- Improve a reduced testing and sampling plan
- Stabilise indicators for statistical process control
- Reduce inventory levels
- Obtain continuous and on-time deliveries
We guarantee the delivery of high quality and functional products as a result of:
- Years of experience in manufacturing and testing in the aerospace industry, especially in surface engineering, allow us to deliver specimens with the highest quality standards
- AS9100 certification for machining difficult-to-machine parts made of nickel and cobalt base superalloys, titanium, and hardened steel
- Proven machining processes of nickel and cobalt base superalloys, titanium, and hardened steel
- Fixed production lines for specimen preparation
Test coupons, also called „test buttons” for testing the tensile and bond strength of coatings are our flagship product. We know how many variables there are in testing and we do our best to minimise their impact on test results.
Our proprietary manufacturing process allows us to produce test buttons with tight tolerances down to 0.0004 inch or 0.01 mm TIR:
Flatness of flat surfaces
Parallelism of flat surfaces
Outside diameter
similar surface finish as the part
The results of the fabrication are
TENSILE / BOND STRENGTH OF COATING TEST COUPON / BUTTON
Furthermore, our quality inspection staff check each one of them.
Why use test coupons with tight tolerances?
Thermal Spray facilities, especially in the aerospace industry, often need to verify coating quality through destructive testing, such as tensile / bond strength testing. This is required for three primary reasons:
- To obtain approval for the coating as part of the qualification process,
- To continuously monitor the consistency of the coating,
- To reduce the frequency of testing in accordance with the Reduced Testing / Sampling procedure.
The acceptability of the above activities often depends on a process capability / performance index CPK / PPK calculated with test results in the Statistical Process Control; the more stable the test results, the higher test reductions can be achieved and maintained. There are many factors for variation in test results, but one of them is the quality of test specimens. But with the test buttons we manufacture, you can:
- achieve better test results for coating qualification,
- improve reduced tests and keep them at a high level.
Please see a visualisation on the graph below.
