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If anyone ever tries digging into this phenomena, I'd like to be a little bit of help. Try reading something about the "Dynamic Strain Aging" and "PLC effect". Still if you are lazy and do not prefer it, well, as an unqualified person I'd say it is "...due to the impurities obstructing the dislocations from occuring. These interstitials and etc. just forms non-permanent molecular bonds and keeps the dislocations from moving. When the stress overcomes an impurity site, then it encounters another and this whole thing keeps going like a cycle; and this is the reason of that fluctuation which goes on like till the stress-strain curve reaches its secondary yield point."
p.s. wiki was quite much the thing that Ive learned it all from...
What else can I help you with?
When a tensile strength test specimen begins to deform permanently it has reached its?
Tensile yield point or yield strength
What is the yield point of hardened steel?
The yield point of hardened steel is the stress level at which the material begins to deform plastically, meaning it will not return to its original shape once the stress is removed. This point varies depending on the specific alloy and heat treatment of the steel, but generally, hardened steels can have yield strengths ranging from about 500 to over 2,000 MPa (megapascals). Beyond this yield point, any additional stress can lead to permanent deformation or failure. Understanding the yield point is crucial for applications where steel components are subject to high loads or impacts.
What is yield point?
it is when the rock compresses into trees and it turns into a fossil in a few million years
Why Aluminium has no lower yield point like Mild Steel?
Aluminium does not have a distinct lower yield point like mild steel due to its face-centered cubic (FCC) crystal structure, which allows for more uniform plastic deformation. In mild steel, the body-centered cubic (BCC) structure results in a noticeable yield point due to the movement of dislocations being more restricted. As a result, aluminium exhibits a more gradual transition from elastic to plastic deformation, lacking a clear demarcation between yield and non-yield behavior. This characteristic makes aluminium behave differently under stress compared to mild steel.
When ultimate tensile strength will be equals to yield strength?
Ultimate tensile strength (UTS) equals yield strength in materials that exhibit a very limited plastic deformation before fracture, typically in brittle materials. In such cases, the material fails shortly after reaching its yield point without undergoing significant elongation or necking. This scenario is often observed in ceramics or some hard metals, where the distinction between yield and ultimate tensile strength becomes negligible due to the lack of ductility.
Why the mild steel have two yield points?
Low carbon steels suffer from yield-point runout where the material has two yield points. The first yield point (or upper yield point) is higher than the second and the yield drops dramatically after the upper yield point. If a low carbon steel is only stressed to some point between the upper and lower yield point then the surface may develop Lüder bands.
What is the difference of rupture point and yield point?
katree
What is the dividend yield considered to be?
The dividend yield is considered to be the most important aspect of any yield. It is the point at which a yield becomes profitable and remains profitable after that.
When does the yield strength of a rectangular metal wire say stainless steel or titanium wire increase?
If you work it beyond the yield point then you raise the yield point in a process called strain hardening
A test specimen is stressed beyond the yield point and is then unloaded its yield point will be?
increased...because the specimen is strain hardened due to plastic deformation.
Why the yield point occur in the stress-strain graph of mild steel?
Once material is stressed. dislocations present in it starts to move and gather near grain boundary. These dislocation are repulsive in nature and resist further movement, hence yield point occurs. Once dislocations crosses the grain boundary, there is very less amount of force required to keep them moving, hence yield point phenomenon appears i.e. less amount of force is required.
What is the difference the proportional limit and the yield point of a spring that has been over stretched?
The proportional limit is the maximum stress at which stress and strain are directly proportional. The yield point is the stress at which the material begins to deform plastically. If a spring has been overstretched beyond its yield point, it won't return to its original shape when the load is removed.
When a tensile strength test specimen begins to deform permanently it has reached its?
Tensile yield point or yield strength
What is the yield point of hardened steel?
The yield point of hardened steel is the stress level at which the material begins to deform plastically, meaning it will not return to its original shape once the stress is removed. This point varies depending on the specific alloy and heat treatment of the steel, but generally, hardened steels can have yield strengths ranging from about 500 to over 2,000 MPa (megapascals). Beyond this yield point, any additional stress can lead to permanent deformation or failure. Understanding the yield point is crucial for applications where steel components are subject to high loads or impacts.
What is mean by yield strength of steel?
The steel has a ductile material properties so that it could be elongate at a point of ultimate yield point.It is stable while before the break point
Referring to changes in yields a basis point equals?
A basis point represents a one-hundredth of a percentage point change. For example, if a bond yield increases by 25 basis points, it means that the yield has increased by 0.25%.
What factors affect the melting point of aspirin?
losing yield
