Metallographic testing, also known as metallography, is the study of the physical structure and components of metals, typically using microscopy. It involves the preparation of specimens and their examination with a microscope to observe features such as grain size, phase distribution, and inclusions. This analysis can reveal the properties of the metal, such as hardness, flexibility, and strength. It's often used to understand a metal's performance, diagnose failures, or ensure that metals meet the required standards for a particular use.

 

Metallography Testing Services at ASR Metallurgy

Metallography testing is essential for understanding the properties and ensuring the quality of metals. It involves examining the microstructure and features of a metal at high magnification. At ASR Metallurgy, we offer a comprehensive range of metallographic testing services:

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1. Microstructure Analysis:

• Test Method: ASM Metals Handbook, Volume-09

• This test gives insights into the metal's internal structure, revealing its phase composition, grain boundaries, and potential defects.

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2. Grain Size Measurement:

• Test Methods: IS 4748:2021, ASTM E112-2013

• Grain size affects mechanical properties like strength and toughness; our tests measure these aspects to ensure material reliability.

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3. Non-Metallic Inclusion Analysis:

• Test Methods: IS 4163:2021, ASTM E45-18A

• We identify inclusions that can affect a metal's mechanical properties and potential for causing failure.

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4. Nodularity Analysis:

• Test Methods: IS 7754:1975, ASTM A247:2019

• For materials like ductile iron, nodularity analysis is critical to assess the material’s ductility and fatigue strength.

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5. Flake Analysis:

• Test Methods: IS 7754:1975, ASTM A247:2019

• We evaluate the shape and distribution of graphite flakes in cast iron, which can influence its strength and shock resistance.

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6. Volume Fraction:

• Test Method: ASTM E562:2003

• Determining the volume fraction of different phases can predict how a metal will perform under stress.

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7. Case Depth:

• Test Method: IS 6416:2018

• This test measures the depth of hardening of a material's surface, which is crucial for wear resistance.

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8. Decarburization:

• Test Methods: IS 6396:2008, ASTM E1077:2014

• We assess the surface loss of carbon in steel, which can soften the material and reduce fatigue resistance.

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9. Coating Test:

• Test Methods: IS 3203:1987, ASTM B487:2020

• Our tests evaluate the thickness, uniformity, and adherence of coatings applied for corrosion resistance and other properties.

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10. Macroetching Test:

• Equipment Used: Stereo Microscope

• Test Methods: IS 13015:1991, ASTM E340:2021

• Macroetching provides a view of the metal's macrostructure to identify any structural inconsistencies or imperfections.

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Equipment Used: 

• Optical Microscope (Quantimet live image tech)

• Stereo Microscope

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These tools are pivotal for conducting in-depth metallography testing. With our specialized equipment and expert techniques, ASR Metallurgy provides clients with critical insights into their materials, ensuring that they meet the required standards and are fit for their specific applications.