Waa maxay sababta Bir-la'aanta ah Magnetic u tahay?
Jawaab: Dadku waxay inta badan isticmaalaan birlabyada si ay u ogaadaan tayada birta aan-ka-baxa lahayn. Haddii magnetka aan la soo jiidan, waa run oo qiimo cadaalad ah. Taas lidkeeda, waxaa loo arkaa been abuur. Dhab ahaantii, kani waa hab aad u hal dhinac ah oo aan macquul ahayn oo lagu garto khaladaadka.
Birta aan birta lahayn ee Austenitic waa bir bir ah oo aan magnetic ahayn ama daciif ahaan; Martensitic ama birta aan lahayn ferritic waa magnetic. Si kastaba ha ahaatee, ka dib markii birta austenitic ahama waa qabow baaraandegi, qaab dhismeedka qaybta warshadaysan ayaa sidoo kale u beddeli doona martensite. Marka uu sii weynaado qallafsanaanta farsamaynta, isbeddelka martensite oo badan iyo sifooyinka birlabeedka. Alaabta alaabtu isma beddeli doonto. Habka xirfadeed ee dheeraadka ah waa in la isticmaalo si loo ogaado maaddada birta aan lahayn. (Baahinta spectrum, ogaanshaha dareeraha ee birta aan kala sooc lahayn).
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