I want to fabricate one dye for powder compaction and samples for tensile test. What is the minimum size of tensile test specimen so that a smaller dye can be made according to specimen?
Neeraj: We use here a 1 inch (25 mm) gauge length and diameter is 1/4 in (6 mm). The machine that we have has the extensometer for the purpose.
Smaller sized samples can also be prepared. Refer to the standard ASTM E-8
Subsize specimen based on ASTM E8:
Gage length=25 mm
Width=6 mm
Radius of fillet=6 mm
Overal length=100 mm
Width of grip section=10 mm
In addition to the ASTM spec; Suitable fixture designed to facilitate the holding of the test piece on its length grip between the fixed and moveable jaws of an UTM can handle even still lesser dimensions .... the load calibration of the dial guage has also limitation on softer materials / specimens.
Per ASTM E8/E8M, the smallest sub-size flat specimens use the dimensions listed by Amir Atrian, above. The smallest sub-size round specimens are 2.5 mm diameter, with a 10 mm (L/D=4) or 12.5 mm (L/D=5) gage length. Other, smaller, specimen sizes are possible, however there are several issues to consider. If you are trying to compare elongations between different specimen sizes, you need to make sure that the L/D ration remains the same. Also, the grain size of the material can play a role in measured elongation - using a very small specimen with a large grained material is not a good idea.
Gage length=25 mm, Width=6 mm, Radius of fillet=6 mm, Overall length=100 mm.
Some time fixture can also be used to hold the specimen
However you can make smaller if your sample is so small. many researched do like this.
The non-standard dimensions of tensile specimens can be kind of user-defined...as long as the specimens generate uniaxial tension strain path...
what are the minimum dimensions of a test specimen for tensile and hardness test produced through powder metallurgy. ASTM E8/E8M are for non ferrous metals. And ASTM B925-14 is standard for powder metallurgy parts. as i cannot access to the standard..I need your help.. thankz
the specimens Smaller sized samples can also be prepared. Refer to the standard ASTM E-8
i want to perform tensile test on Myoma tissue. the stiffness of this tissue is similar to muscle.
the problem here is the sample size. i have to prepare it like a sheet with maximum length of 3 cm.
i would like to ask you guys let me know the most appropriate dimensions for my samples like: Length, Width, fillet radius, and Thickness.
Thanks
Hello Brother,
Please you check documents of standard tensile test bellow.
Thank you !
From Piseth
Hello,
Please help me with the outer diameter of the sub-size sample of 4 mm gage diameter and 16 mm gage length.
According to ASTM, the smallest sub-size round specimens are 2.5 mm diameter, with a 10 mm (L/D=4) or 12.5 mm (L/D=5) gage length, width=1 cm. Powder metallurgy route made materials tensile specimens are prefered in the case of smallest subsize specimens.
Dear Neeraj, there basically ASTM book available you can follow that one and I have one document file please look it , I hope it will be helpful to you.
best wishes.
Please, kindly have the ASTM D1708 for micro-tensile attachment here
There is a subsize coupon in ASTM E8 standard. Although there are much smaller coupons in papers.
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