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what are the various type of defects that you find in metals?

Typical metallic structure doesn't seem to have a defect as such. Yet, metal ions may migrate to interstitial voids, this defect is called Frenkel defect. By reaction with a non-metal on the surface, metals may liberate electrons e.g. Zinc, this defect is called Metal Excess defect due to anionic deficiency.

hi dear,
broadly there are two types of metal defects:--
1- stiochiometric defect and
2- non-stiochometric defects

stiochimetric defects include
1-schottky defect-due to missing of ions from lattice point in pairs
2-frenkel defects-it is caused dur to the creation of lattice vacancy as a result of misplaced ion in interstial site. it is common in solid ith high co-ordination no.


2---non-stiochometric defects- ratio of positive and negativeion differ from that indicated by chemical formula.
thanks

Defects in metal structure are:
1. Dislocations

2. Point Defects
Found in grains of metal's lattice structure

3. Volume Defects
Divided in to three parts
(a) void (b) crack (c) inclusion of foreign particles

Casting Defects : it is of different category defect

Dear,
There are so many Types of Defects Found in Metals like Structural defect,interstitial impurity, Substitutional impurities,Dislocation,corrosion etc

Thanks

Originally Posted by Unregistered

what are the various type of defects that you find in metals?

Hi,

Following defects are found in metals:
Crystallographic defect
# 1 Point defects
# 2 Line defects
# 3 Planar defects
# 4 Bulk defects

Interstitial defect
# 1 Self-interstitials
# 2 Impurity interstitials

Casting defect
* 1 Shrinkage defects
* 2 Gas porosity
* 3 Pouring metal defects
* 4 Metallurgical defects

welding defect :

sasting defect :

1.Blow
2.Scar
3.Blister
4.Gas hole
5.Pin hole

Moulding material defect :

1.Cut & washes
2.Run out
3.Fusion
4.Swell
5.Metall penetration
6. Rail tail
7. Scrab

Pouring metal defect :

1. Miss run
2. Cold shut

Scrab mould defects?

give types of casting defect

Please I need more explanation on volume defect

Hi dear,
Following defects are found in metals:
Crystallographic defect
# 1 Point defects
# 2 Line defects
# 3 Planar defects
# 4 Bulk defects

Interstitial defect
# 1 Self-interstitials
# 2 Impurity interstitials

Casting defect
* 1 Shrinkage defects
* 2 Gas porosity
* 3 Pouring metal defects
* 4 Metallurgical defects
Thanks

hi dear,
broadly there are two types of metal defects:--
1- stiochiometric defect and
2- non-stiochometric defects

stiochimetric defects include
1-schottky defect-due to missing of ions from lattice point in pairs
2-frenkel defects-it is caused dur to the creation of lattice vacancy as a result of misplaced ion in interstial site. it is common in solid ith high co-ordination no.


2---non-stiochometric defects- ratio of positive and negativeion differ from that indicated by chemical formula.
thanks

what are the major defects in metals and alloys due to faulty heat treatment

Dear Friend

Defect of Imperfection in metals is defined as the irregularities or deviation from the ideal arrangement inside a metal.

It occurs generally when crystallization process occurs at fast or moderate rate.

There various metal defects are as follows:

1.Point Defects

Under this there are three types of defects:

>>Impurity defect

>>Stoichiometric defect

1.Vacany defect

2.Frenkel defect

3.Schottky defect

>>Non stoichiometric defect

2.Line defects:

It is further classified into :

>>Edge dislocation

>>Screw dislocation

3.Surface defects:

>>Internal defect

1.Grain Boundaries

2.Tilt boundaries

3.Stacking fault

4.Twin boundaries.

>>External defect

Hope the information helps you.If you have any more query regarding this you can leave your message here.

All the best

aashisranjan784