I confess I didn't read each and every word because my brain started to fry. This paper certainly must be some kind of hoax.
It gives the appearance of a genuine scientific paper as far as how it's formatted. The last third is loaded with impressive formulas with plenty of Lambda symbols and Integral notations designed, no doubt, for impressing those readers who stopped studying mathematics well before they finished high school. Most folks will quickly gloss over all these formulas, while being left with an impression that the author must be well educated. Although I studied a LOT of math beyond high school, I confess I glossed over them as well. The paper concludes with a long list of references, also impressive looking, but unlikely to be reviewed by we who reload. I didn't check any of the references either. That's because by the time I got to the formulas, I had already decided this paper isn't real.
I was also impressed by the grammar and syntax. It strikes me as being written by a person with a poor eighth grade education who spent the next 20 years self educating himself in the field of metallurgy. Could the author have done hard time in a prison with a very narrow selection of prison library books donated by a failed engineering school? I doubt it, but that's how the paper reads. For example, the author says, "As the case walls vary in thickness, so do the internal powder capacity of the case."; not exactly indicative of a paper which was proof read by someone who passed 6 grade English. Over use of the term "due to", even in the title, is another clue. It just doesn't sound as though it was written by a scientist or an engineer.
I choked when I read the paragraph which begins: " The annealing process at which the temperature is slowly raised around 80 ºC above the Austenitic temperature ............................." has to do with heat treating iron alloys, not brass. It looks as though the author simply cut and pasted this paragraph from some engineering book without the slightest understanding of what it means. For those not familiar with the term "Austenite", it is a particular kind of crystal formation in a sold solution of iron along with some sort of alloying element; steel for example.
In short, this paper is amazing, not because it's good, but because it's so mysteriously confounding. I really don't get it. It required a tremendous amount of time to compile, no doubt about that. But why?