Occasional grain
Occasional grain
(OP)
Hi,
What is the meaning of occasional grain ? How can I measure size of occasional grains and how shall I report it (max occasional grain)? Is there any standard for determining occasional grains in metals? I need to determine average grain size and max occasional grains in IN718 forging part according to the requirements of this part, could anyone help me?
What is the meaning of occasional grain ? How can I measure size of occasional grains and how shall I report it (max occasional grain)? Is there any standard for determining occasional grains in metals? I need to determine average grain size and max occasional grains in IN718 forging part according to the requirements of this part, could anyone help me?





RE: Occasional grain
http://www.metallography.com/grain.htm
http://www.astm.org/Standards/E930.htm
Seek and ye shall find.
RE: Occasional grain
In ours we outline how many fields and intercepts are required for accurate grain size.
We also then say that In each filed the operator in to measure the two grains that appear the largest.We only report the actual average grain size but we have the other data on file.
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Plymouth Tube
RE: Occasional grain
RE: Occasional grain
In the requirements of part was written that average grain size shall be max No. 8 and occasional grains shall be max No. 7 according to ASTM E112. Shall I report the biggest grain which I observed in 3 or 5 microstructure images?