Answer
Haalli CH900 (Cold Reduced and Aged at $900^{\circ}F$) sibiilli hin goggogne 17-7PH tiif humna harkisaa fi oomishaa olaanaa ta’e kenna. Aktuweetaroota aerospace keessatti ulfaatinni fi bakki waan danqameef, dhangala’aa humnaa olaanaa barbaachisa. CH900 fayyadamuun, injinaroonni fe’umsa walfakkaataa $P$ osoo eeguun meeshaa haphii $t$ ta’een burqaa dizaayinii gochuu danda’u, sababiin isaas $P \propto t^3$ garuu dhiibbaa $S \propto t^{-2}$. Adeemsi dulloomuu $900^{\circ}F$ irratti kompaawundoota intermeetaalikii aluminiyeemii badhaadhan kanneen dislocations pin godhan ni boba, kunis cimina oomishaa gara tilmaamaan 260 ksitti guddisa. Kunis haalawwan RH950 ykn TH1050 wajjin wal bira qabamee yoo ilaalamu dhiibbaa hojii ol’aanaa fi daangaa garagalchuu guddaa ta’e kan dhaabbataa hin qabne ni hayyama.
