How is macroscopic examination done?

Macro examination A cross section of welded material is polished and etched for examination. Porosity, lack of weld penetration, lack of side wall fusion, poor weld profile and other important defects are checked in accordance with the relevant welding standard.

What is the difference between macro and micro examination?

Macro-study is performed with naked eye or with low magnification to study the surface defects of an material, whereas microstructural study is to identify the type of structure, grain size, distribution of particles, grain boundaries etc.

Why is microscopical examination of metals important?

Microscopy analysis of metals characterises the surface and structure of the material and its application can support your quality control processes. Microscopy analysis of metals is important for ensuring integrity and quality. In addition, companies may require microscopy analysis to protect patented products.

Why is microscopic examination important?

The microscopic exam is often important in detecting and evaluating renal and urinary tract disorders as well as other systemic diseases. …

What is different between microscopic and macroscopic?

The term “macroscopic” refers to large things that are visible to the naked eye while the term “microscopic” refers to tiny things which are invisible to the naked eye. In other words, microscopic properties are invisible to the naked eye, but macroscopic properties are visible to the naked eye.

What is between micro and macro?

Meso level In general, a meso-level analysis indicates a population size that falls between the micro and macro levels, such as a community or an organization. However, meso level may also refer to analyses that are specifically designed to reveal connections between micro and macro levels.

What is the purpose of metallography?

Metallography is the study of materials microstructure. Analysis of a materials microstructure helps determine if the material has been processed correctly and is therefore a critical step for determining product reliability and for determining why a material failed.

Why microstructure test is done?

Examination of the microstructure of a material provides information used to determine if the structural parameters are within certain specifications. The analysis results are used as a criterion for acceptance or rejection.

What is the difference between microstructure examination and macrostructure examination?

MIcrostructure examination include- grains, grain boundaries, some precipitates (require high magnification). Whereas, Macrostructure examination includes- surface examination, machining marks (low magnification)

What is the difference between microstructural and macrostructure of aluminum?

In the microstructural observation, the grain and grain boundaries are easily seen; so as to, it can be easily predict that, the structure belongs to what type of phase. Whereas, the macrostructure only gives the idea on profile of surface. Commercial pure aluminium is a non heat treatable metal containing some Fe and Si as gang material.

What is metmetallographical studies?

Metallographical studies deal with identification of microstructure, grain size, its distribution and grain boundary visualization.