Metallographic Analysis

For nickel-based superalloys such as Inconel 718, metallographic examination of the annealed condition provides an important reference for subsequent processing and heat treatment. Evaluating the initial microstructure helps assess grain uniformity, abnormal grain growth, inclusions, and potential metallurgical defects. Reliable sample preparation is essential for obtaining a suitable surface for microstructural examination and supporting consistent […]

Selective laser melting (SLM) offers significant potential for producing Cu-Ni alloys for marine equipment and heat-exchange components, thanks to their corrosion resistance and thermal conductivity. However, the relatively soft, ductile material and potential microcracks along melt pool boundaries make high-quality EBSD sample preparation challenging. Surface deformation, residual stress, and charging during SEM examination can compromise […]

H59 brass is a copper-zinc alloy with a dual-phase microstructure. Reliable metallographic preparation is essential for clearly revealing the distribution and morphology of the α and β phases. For this sample, TROJAN’s preparation workflow combines controlled sectioning, progressive grinding, and fine polishing to help minimize surface damage and achieve consistent results. Preparation workflow: Cutting:Beta-250 Automatic […]

Silicon–carbon composites are promising anode materials for next-generation lithium-ion batteries. However, their porous structure and the coexistence of soft and hard phases make metallographic preparation challenging. Particle pull-out, pore-related artifacts, surface deformation, and edge damage can compromise microstructural evaluation. A carefully controlled preparation process is essential to preserve the material’s original features.   Preparation route: […]

Have you ever finished grinding, polishing, and etching a specimen, only to find unexplained stains or discoloration the next day? This problem can be particularly frustrating when preparing coated, plated, or surface-treated components, such as chrome-plated gears, nickel-plated parts, thermal spray coatings, and carburized or nitrided layers. Regrinding and repolishing may not solve the problem […]

TC4 is a widely used α+β titanium alloy. Reliable microstructural characterization begins with controlled sample preparation. In the polished condition, metallographic examination can reveal pores, inclusions, cracks, and other defects. After etching, the α and β phases can be differentiated more clearly for microstructural evaluation. Preparation route: Grinding: MET-F P400 → P800 → P1200 → […]

In additive manufacturing, the layer-by-layer building process can introduce microstructural features and defects that are very different from those found in conventionally manufactured materials. Porosity, cracks, interlayer bonding, grain structure, and melt-pool morphology can all provide important information for evaluating the quality of the printing process. For this 3D-printed pure copper sample, a controlled metallographic […]

Carbon fiber composites combine lightweight design with high mechanical performance, but their heterogeneous structure makes metallographic preparation particularly challenging. During sectioning and polishing, fiber pull-out, surface damage, scratches, and edge rounding can alter the fiber/matrix interface and affect the accuracy of subsequent microstructural analysis. For this sample, a controlled preparation route was used: • TJ2568 […]

For coated sapphire components used in optical and precision applications, metallographic cross-sectioning is often used to evaluate coating and ink-layer thickness, interface quality, and overall integrity. The challenge is preparation. Thin coatings can easily suffer from edge chipping, delamination, pull-off, or rounding during cutting and polishing, making the final cross-section difficult to measure accurately. For […]

Cracking, delamination, or brittle fracture during stamping and bending of SPCC cold-rolled steel may not always be explained by dimensions or conventional tensile properties. Cross-sectional metallography can reveal what routine inspection may miss — such as coarse grains, excessive banding, carbide aggregation, or rolling-induced microcracks that can reduce formability and contribute to unexpected failures. For […]

High‑power conductive copper busbars and integrated shunt resistors commonly adopt a dual‑layer electroplating structure: 1.5‑4μm nickel underlayer + 3‑8μm tin top layer, balancing corrosion resistance and electrical assembly requirements. Acting as a barrier layer, the dense nickel underlayer blocks outward diffusion and oxidation of copper substrate ions. It improves plating adhesion, enhances wear‑resistant and high‑temperature‑resistant […]

Mo-W alloys combine the superior properties of two refractory metals, featuring ultra-high melting points and excellent dimensional stability at elevated temperatures, widely adopted for high-temperature structural applications. Different from most hard alloys, Mo-W alloys are relatively softer with better ductility — a characteristic that creates challenges for metallographic sample preparation. When processed on a countertop […]

Alumina ceramics possess outstanding properties including high hardness, superior wear resistance, corrosion resistance and excellent insulation. As widely used structural and functional ceramics, they are applied in electronic insulation parts, precision wear-resistant components, high-temperature shielding, aerospace and metallurgy. Their microstructure directly governs the service performance and lifespan of finished products. Metallographic examination allows clear observation […]

The Han Dynasty marked the golden age of ancient Chinese bronze mirror craftsmanship. Mirrors were predominantly cast from a ternary alloy of lead, tin and copper with a classic ratio roughly 14:5:1. Lead improves the fluidity of molten alloy, enabling sharply defined decorative patterns, stable forming and mass production — a remarkable achievement of Han […]

The cross-sectional morphology of nylon and PET fibers holds critical clues to material performance. Metallographic analysis reveals distinct fiber cross-section geometries—standard circular, custom cross-shaped, hollow or trilobal profiles. These microstructures directly govern fiber luster, hand feel, moisture absorption and mechanical strength. For instance, hollow cross-sections deliver lightweight warmth, while profiled shapes improve moisture wicking. Engineers […]

WC-10Co4Cr is the ideal protective cermet for HVOF/HVAF thermal spraying, outperforming traditional hard chrome and ordinary tungsten carbide against wear, salt spray and acid-alkali erosion.   Key advantages:   • Hardness up to HRC 67-70 with outstanding wear resistance • Chromium formula delivers superior anti-corrosion performance • Dense coating with high bonding strength, works under […]

High-strength fasteners adopt an integrated manufacturing process: quenching & tempering base treatment plus nitriding surface strengthening. Low-temperature nitriding forms a dense white nitrided layer on thread surfaces with minimal heat treatment distortion, fully securing dimensional precision of threads. Metallographic testing acts as a core quality control measure across the entire fastener production workflow. It enables […]

Bronze mirrors of the Han Dynasty mark the pinnacle of ancient Chinese mirror casting craftsmanship, evolving through three distinct phases: Early & mid-Western Han inherited techniques from the Warring States Period before forming a unique minimalist aesthetic. From the late Western Han to the Wang Mang reign, geometric TLV pattern mirrors and blessing inscriptions became […]