What is coring? Is it a defect?
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Yes coring is a defect. Cited structure are common and usually removed during homogenizing heat treatment. Actually it occurs due to non equilibrium cooling conditions. Think as liquid solidifying into solid, now solid diffuse slower than liquid and in an alloy this process occurs for a range of teRead more
Yes coring is a defect. Cited structure are common and usually removed during homogenizing heat treatment.
Actually it occurs due to non equilibrium cooling conditions. Think as liquid solidifying into solid, now solid diffuse slower than liquid and in an alloy this process occurs for a range of temperature. If we don’t maintain sufficiently slower cooling rate then what happens.
When we cool and after the first solid of say of composition a forms. After further undercooling liquid solidifies further but due to slow diffusion of solid a it’s centers is still there and new solid b composition forms radially around it. In this ways when the solidification is completed the center of solid has region of high melting( remember this solid formed at higher temperature) and outer region has low melting solid. This type of structure is called Cored structure or coring.
Hope you got my point you can further refer to books like vijender singh or callister for further reading.
See lessCoring is a defect. It happens when a heated alloy, such as a Cu-Ni system , cooling in non equilibrium conditions. It is observed in alloys having a marked difference between solidus and liquidus temperature. It is often being removed by annealing and / or hot working.
- Coring is a defect.
- It happens when a heated alloy, such as a Cu-Ni system , cooling in non equilibrium conditions.
- It is observed in alloys having a marked difference between solidus and liquidus temperature.
- It is often being removed by annealing and / or hot working.
See lesshow does coring defect look in micro structure ? how does it affect the properties ?
how does coring defect look in micro structure ? how does it affect the properties ?
See lessCoring is a defect in an alloy that occurs when a heated alloy is cooled too fast for diffusion to occur.
Coring is a defect in an alloy that occurs when a heated alloy is cooled too fast for diffusion to occur.
See lessCoring is solidification defect, non uniformity of phases occur from centre to surface. Annealing will overcome this deficiency
Coring is solidification defect, non uniformity of phases occur from centre to surface. Annealing will overcome this deficiency
See lessCoring is a defect in an alloy that occurs when a heated alloy is cooled too fast for diffusion to occur. This causes the alloy to be in a non-equilibrium condition because the exterior portion cools and solidifies before the interior portion, which remains hot and soft. Mostly seen in castings.
Coring is a defect in an alloy that occurs when a heated alloy is cooled too fast for diffusion to occur. This causes the alloy to be in a non-equilibrium condition because the exterior portion cools and solidifies before the interior portion, which remains hot and soft. Mostly seen in castings.
See less