Which inspections are used for single crystal blade castings?
Which inspections are typically used for single crystal blade castings?
Single crystal blade castings are commonly reviewed with FPI, X-ray or CT when required, CMM inspection, metallography, chemical analysis, and mechanical testing when specified. The exact inspection plan depends on the blade drawing, alloy, acceptance standard, project stage, and whether NewayAeroTech is supplying a casting blank or a finished component.
Inspection should be defined before supplier comparison. For single crystal turbine blade casting projects, the buyer should state which records are mandatory and which checks are optional or subject to engineering review.
Main Inspection Methods
FPI is used to identify surface indications such as cracks or other surface-breaking flaws when required by the acceptance route. X-ray or CT may be used for internal conditions such as shrinkage, porosity, or inclusions, depending on the part and standard. Metallography may be requested for grain or microstructure evidence in single crystal work.
CMM inspection is useful when blade roots, platforms, sealing faces, datum features, or machined interfaces need dimensional evidence. CMM does not replace metallurgical inspection, but it supports fit and assembly control when finished geometry matters.
Inspection | Main Purpose | Typical Output |
|---|---|---|
FPI | Surface indication review | Surface acceptance record where required |
X-ray / CT | Internal condition review | Evidence for porosity, shrinkage, or inclusion concerns |
CMM | Dimensional confirmation | Datum, root, platform, and interface report |
Metallography | Grain or microstructure review | Section evidence subject to specification |
Chemical / mechanical testing | Material verification when specified | Certificate or test report |
Buyers should avoid writing only "inspection included" in the inquiry. That phrase does not define sampling level, report format, acceptance standard, inspection timing, or whether records must ship with the parts.
When Each Inspection Is Needed
The inspection package should follow the failure mode and the supply condition. A raw casting, heat-treated part, machined root, EDM feature, or coated component may need different checkpoints, especially when superalloy post-processing is part of the quote.
For example, FPI may be enough for a surface indication question, while X-ray or CT may be needed for internal condition review. Metallography is a different request; it is normally tied to grain or microstructure evidence rather than dimensional fit.
Inspection Records to Include in the RFQ
Send the inspection standard, critical features, report format, sampling expectation, and delivery-record requirements with the RFQ. NewayAeroTech can then connect casting route review with the required inspection evidence and quote the real acceptance scope instead of adding records later.
This keeps the inspection discussion short but complete. The buyer gets a quote that states what is included, what remains subject to review, and which documents are needed before approval.
NewayAeroTech does not need every possible inspection named for every blade. We need the inspections required by the drawing, purchase specification, or application risk. That keeps the answer focused and prevents unnecessary cost from being added to the quote.
If the buyer is unsure, list the critical surfaces and expected records first. NewayAeroTech can then identify whether additional review is needed before confirming the manufacturing route. This is usually enough for an initial inspection discussion.
