Alright dog bone specimen is not an issue guys, what i was trying to ask is why DEFORMED BARS don't have the same specimen for tensile testing ?
Perhaps anyone over here knows this
Well i was also googling for a while but could get any significant answer, somehow i came to know it does define capacity, i think you may also have a look.
http://www.machine-world.net/machine.asp?mid=46&sid=49
Sr. 13
But still i am not clear about that perhaps it is MegaPond-metre...
Recently i saw a 6 tons counter blow hammer, having a plate coupled stating its capacity as "6 MPm". I tried working out this MPm but could not get any clue. Can anyone please tell me what this MPm is about?
yes i mean the shape exactly . . . are there some mechanical considerations for this ? well there are also some dependent properties which are not intrinsic, if it was for properties which regard for size exclusion it might not pose a problem.
Thanks for ur support, I am looking forward for...
ASTM provides standards for testing that's obvious enough if talk about the standard specimen profile; but idk that some specimen ,for instance round bars, are recommended to have a standard Dog Bone specimen but in case of deformed bar we don't have any special specimen.
Tensile tests are...
Laminar structure appear macroscopically in a sense, uniform flow of metal during compression causes formation of such structure. Laminar structures are synonymous to laminae in composites, hence they favour crack arrest.
Hope this solves your query, if more interested try searching for Laminar...
Forging improves toughness due the laminar structure i.e. formed during forging process. Grain size is reformed and yes inhomogeneities like cracks, voids are minimized during forging.
Elastic modulus is actually the elastic strain borne the atomic bonds. Since bonds in metals (metallic bonds) are isotropic (uniform) therefore elastic modulus remains the same regardless of the size of the object. Properties beyond the elastic limit however are transitive depending on different...
Formation of necks is mainly due to the formation of micro-voids, that form during the plastic flow of metals/alloys under tension. So, when a micro-void is formed atomic layers slide around them. These micro-voids coalesce to form micro-cracks (Stress Raisers) which causes fracture.
Basically...
well optical microscopy do reveal twins in brasses, hopefully twins in Si can also be observed but I am not pretty sure about this. Otherwise if it does you shoud have to look for an etchent for that . . . .
Well i couldnot help out with the concept that conventional tubes for x ray production require high acceleration voltages in the order of kVs but how a portable XRF produces x rays with a rechargeable battery ?? Does it produce high enough accelerationn pressure, i have some doubts or there is...
yeah glass is categorized as ceramic material, and yes ceramics also do occur naturally; look for Obsidian, a naturally occurring glass in volcanic eruptions.
but nevertheless its always a ceramic.
I have sintered powdered Aluminum at temperature about 540 Celsius, can i anyone tell me how it should be characterized ?
Meaningly, has it been sintered successfully or not !