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What are miller indices?
they are reciprocal of intercepts made by plane in crystal structure
What is a solid material with atoms arranged in a repeating pattern?
A crystal is a solid. But it is a solid with a natural geometrically regular form that has plane faces that are arranged symmetrically.
What happens when an amorphous solid breaks?
The solid breaks at random places. Apex. thanks guy below for leading me to this answer
What type of crystal is found in kcl crystal?
ionic crystal
What is the purpose of a slip roll?
The purpose of a slip roll is for one to taste better food by making a slip roll. In addition, a slip roll has a purpose of allowing one to eat more comfortably.
What is difference between sessile dislocation and glissile dislocation?
a sessile dislocation has a burger's vector that does notlie in the primary slip plane of the crystal, so it is immobile.a glissile dislocation has a burger's vector that doeslie in the primary slip plane of the crystal and thus is able to move in that plane.
What is difference between cross slip vs slip?
Dislocations move because the resolved shear stress (Schmidfactor) is sufficient high enough to activate the glide system in which the slip plane lies. (slip) Screw-dislocations in fact are able to move from one slip plane to another parallel plane (burgers vector does not change!). In a fcc lattice a $dislocation may change the (111) plane to (1 -1 1) plane due to local stresses. (cross slip) Edge dislocations can change their planes too. It is a thermally activated process which is called climb (vacancy flux).
What is difference beween slip and twinning?
1-Slip occurs in distinct atomic spacing multiples, whereas the atomic displacement for twinning is less than the inter-atomic separation, usually proportional to their distancesfrom the twin plane. 2-for slip, the crystallographic orientation above and below the slip plane is the same both before and after the deformation; for twinning, there will be a reorientation across the twin plane.
What is the substance with 3-dimensional plane faces?
Crystal
What are miller indices?
they are reciprocal of intercepts made by plane in crystal structure
Describe Burger vector in fcc material?
Slip in FCC (face centered cubic) crystals occurs along the close packed plane. Specifically, the slip plane is of type {111}, and the direction is of type . In the diagram, the specific plane and direction are (111) and [-110], respectively. Given the permutations of the slip plane types and direction types, FCC crystals have 12 slip systems. In the FCC lattice, the Burgers vector, b, can be calculated using the following equation:[1] : [1] Where a is the lattice constant of the unit cell. Unit Cell of an FCC material.
What is the schmid factor?
The Schmid factor m is part of the equation for the critical resolved shear stress τ0. The critical resolved shear stress is the component of shear stress in a slip plane, resolved in the direction of slip, necessary to initiate slip in a grain (plastic deformation in metals). m = cos(κ)cos(λ) ; τ0 = mσ κ - the angle between the applied load direction and the slip plane normal. λ - the angle between the applied load direction and the slip direction. σ - the applied stress or load
Distinguish between sessile dislocation and glissile dislocation?
A sessiledislocation has a Burger's Vector that does not lie in the primary slip plane of the crystal, so it is immobile offering an obstacle to the movement of other dislocations.A glissile dislocation has Burger's Vector that does not lie in the primary slip plane of the crystal and thus is able to move in that plane.Dislocation that can move by pure slip are called Glissle.Dislocation which cannot glide, but have to move by some form of mass transport are called sessile.In crystals, the dislocation core spreads to certain crystallographic planes containing the dislocation line. If the core spreads into one of such planes, the core is planer and is glissile.If the core spreads into several non-parallel planes of the zone of dislocation line, it is non-planar and sessile. In the former case dislocation moves easily in the plane of the core spreading, while in the later case, it moves only with difficulty. Shockley partial is a partial dislocation, the Burger vector of which lies in the plane of the fault. Then, Shockley partials are glissile. A Frank partial is a partial dislocation, the Burgers vector of which is not parallel to the fault. Then, Frank partials are sessile.
How you determine the crystal class and crystal system of a crystal from its symmetry content?
you can determine crystal class and crystal system of a crystal from its symmetry by 3 criteria of symmetry.1.plane of symmetry:this divides the crystal into two such that one half of it is a mirror image to the other,e.g a halite(cube) has 9 plane of symmetry.(2)axis of symmetry:this is the axis about which the rotation takes place when a crystal wants to occupy position in space more than one time in a complete turn.(3).centre of symmetry:this when the like faces,edges e.t.c are arrange in pairs in corresponding position on the opposite side of the central point.
What Homogeneous substance bounded by plane surfaces making definite angles giving a geometric form?
Crystal
What is a regular repeating arrangement of atoms ions or molecules?
A regular repeating arrangement of atoms, ions and molecules is called a crystal. This structure has its plane faces in a symmetrical order.
Is burger vector and dislocation line both lie in one plane in sessile dislocation?
>> Burger vector and dislocation line both not lie in single active slip plane in sessile dislocation.
