What is intergranular brittle fracture?

An intergranular fracture is one kind of brittle fracture. When brittle fracture occurs, the crack initiates and propagates through the material at high speeds (the speed of sound). Factors that favor crack initiation include: Larger grain size. Lower temperatures.

Is ductile fracture typically intergranular or transgranular?

Ductile fracture generally occurs in a transgranular way. Just to clarify, transgranular means the propagation of fracture proceeds between grains of the material. Most of the ductile metals show necking and a certain amount of plastic deformation under a static load.

What is transgranular cleavage?

Cleavage fracture is the most dangerous form of fracture, which is classified as a brittle transgranular fracture by separation across well-defined crystallographic planes; From: Micromechanism of Cleavage Fracture of Metals, 2015.

What is meant by transgranular?

A transgranular fracture is a fracture that follows the edges of lattices in a granular material, ignoring the grains in the individual lattices. This results in a fairly smooth looking fracture with fewer sharp edges than one that follows the changing grains.

What is transgranular and intergranular?

While intergranular cracking denotes the failure of interfaces between contiguous grains, transgranular cracking refers to the failure of individual bulk grains along specific crystallographic planes.

Can brittle fracture be transgranular?

There are two major types of brittle fractures: transgranular and intergranular. With transgranular fractures, the fracture travels through the grain of the material. It changes direction from grain to grain due to the different lattice orientation of atoms in each grain, following the path of least resistance.

Is brittle fracture intergranular or transgranular?

Intergranular brittle fracture involves cases in which the grain surfaces do not have dimples that signify microvoid coalescence. Such fracture is termed brittle due to fracture prior to plastic yielding.

Which of the following alloy in which both intergranular and transgranular cracking occurs?

8. Which of the following alloy in which both intergranular and trans-granular cracking occurs? Clarification: Stress-corrosion cracking can be intergranular and trans-granular cracking. Alloys such as high-nickel alloys, iron-chromium alloys, and brasses often crack both in intergranular and transgranular manner.

What is transgranular and intergranular corrosion?

Intergranular stress corrosion cracking (IGSCC) – Cracks propagate along the grain boundaries. Transgranular stress corrosion cracking (TGSCC) – Cracks run through the individual grains.

What is transgranular corrosion?

Transgranular corrosion is a type of localized corrosion which occurs along cracks or faults across the crystals in metals and alloys. It follows the pattern of grains in the individual lattices of the material. Stress corrosion of austenitic steels is usually transgranular.

What is the difference between the intergranular fracture and transgranular fracture and at what conditions do they occur?

Intergranular fracture, intergranular cracking or intergranular embrittlement occurs when a crack propagates along the grain boundaries of a material, usually when these grain boundaries are weakened. The more commonly seen transgranular fracture, occurs when the crack grows through the material grains.

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