Failure analysis lab: fractography and root cause of breakage

A part failure can lead to a production shutdown, a quality non-conformance, a safety risk, or a supplier dispute. In this context, calling on a failure analysis lab makes it possible to objectively identify the causes of failure and reconstruct the breakage scenario. The goal is not only to observe the fracture, but also to identify the initiation point, track crack propagation, and distinguish between a material defect, excessive loading, fatigue, impact, corrosion, or external contamination. This approach applies to many materials: metals, alloys, polymers, composites, ceramics, and other technical materials.

Fracture surface analysis is carried out by stereomicroscopy and scanning electron microscopy coupled with EDX to study the morphology of the broken area. This step makes it possible to identify a crack initiation point, fatigue striations, an overload zone, local embrittlement, or signs of impact-related failure. Fractographic analysis forms the basis of fracture surface expertise for metal, polymer, or composite parts.

The technical means used depend on the nature of the part and the suspected mechanism. The laboratory relies in particular on stereomicroscopy, SEM-EDX, optical microscopy, and hardness tests such as Vickers, Brinell, or Rockwell. These tools make it possible to study topography, roughness, microcracks, striations, microstructure, and mechanical behavior gradients that are useful for understanding the failure.

The laboratory provides manufacturers with PhD-level experts and engineers specialized in materials and failure analysis. The goal is not only to produce an analytical report, but to deliver a technical interpretation that can be used by quality, production, maintenance, purchasing, or in discussions with a supplier. This approach makes the failure analysis lab a decision-support partner for qualifying a non-conformance, comparing a failed part with an intact one, and prioritizing the most useful investigations.

The laboratory supports manufacturers in failure analysis through fracture surface expertise and root cause breakage analysis. Observing the fracture surface makes it possible to distinguish a sudden failure from a progressive one, locate the initiation zone, and highlight any surface or structural anomalies. Depending on the need, this expertise is supplemented by hardness testing, metallographic examinations, elemental analysis, and investigations into the service environment. The aim is to provide actionable results to understand, correct, and prevent the defect from recurring.

Beyond the fracture surface, the laboratory looks for contributing causes: material non-conformance, microstructural heterogeneity, unsuitable hardness, processing defects, the presence of inclusions, corrosion, or foreign agents. Additional analysis may be carried out on the composition, leachates, or deposits present in the fracture zone. For polymer materials, targeted investigations can also be performed through polymer degradation analysis or polymer analysis by TGA in the laboratory.

When the root cause of breakage involves a chemical or environmental issue, elemental and molecular analysis can be carried out by ICP, GC-MS, LC-QTOF, or elemental analyzers. This investigative approach is particularly useful for highlighting contamination, a corrosive deposit, leaching, or material/environment incompatibility. In some cases, links can also be made with services for characterizing the biosourced origin of a product when the nature of the material or its formulation needs to be confirmed.

Support can cover laboratory expertise, result interpretation, guidance toward additional analysis, and assistance in understanding failure mechanisms. For issues involving surfaces, adhesion, cracking, or loss of properties, studying topography and treatments can usefully complement the investigation. This analytical continuity helps define concrete corrective actions: change a grade, review a treatment, adapt a process, secure an environment, or strengthen quality control.

It is relevant to consult the laboratory as soon as an unexplained breakage, recurring cracking, a deviation in mechanical performance, or a service failure appears. The intervention can also be initiated in the context of a dispute, supplier qualification, material validation, or continuous improvement. To act effectively: analyze the broken part and a reference part, understand the fracture mechanism, compare material compliance, identify external factors, correct the process or use, and prevent recurrence. In addition, certain investigations may be part of a broader approach to materials characterization and degradation control.