Ukucutshungulwa kwePlastiki, okubuye kwaziwe ngokuthi ukucutshungulwa kwabezindaba, kuyindlela yokucubungula lapho insimbi noma i-alloy material ikhubazeka ngokwepulasitiki ngaphansi kwesenzo samandla angaphandle ukuze kutholwe usayizi womumo oyifunayo kanye nokusebenza.

Inqubo yokucutshungulwa kwepulasitiki ihlukaniswe yaba yi-deformation eyinhloko kanye ne-deformation yesibili, kanti ukuguqulwa kokuqala kuwukuvala.

I-tungsten, i-molybdenum kanye ne-alloy strips yokudweba ikhiqizwa ngendlela ye-powder metallurgy, okuyisakhiwo esinohlamvu olucolekile, esingadingi ukupakishwa nokubunjwa, futhi singafakwa ngaphansi kwesigaba esikhethiwe kanye nokugoqa kohlobo lwembobo. Ukuze kuncibilike i-arc kanye nezinsimbi ezincibilika ze-electron ezinesakhiwo sokusanhlamvu esimahhadla, kuyadingeka ukuthi uqale ukhiphe noma wenze okungenalutho ukuze umelane nesimo sokucindezela sezindlela ezintathu ukuze ugweme ukwenzeka kokuqhekeka komngcele wokusanhlamvu ukuze kuqhutshekwe nokucutshungulwa.

I-plasticity yezinto yizinga lokuguquguquka kwezinto ngaphambi kokuphuka. Amandla yikhono lezinto zokumelana nokuguquguquka nokuphuka. Ukuqina yikhono lezinto ezibonakalayo ukuze limunce amandla ukusuka ekuguquguqukeni kwepulasitiki kuya ekuqhekekeni. I-Tungsten-molybdenum nama-alloys ayo avame ukuba namandla aphezulu, kodwa abe nekhono lokuguga lepulasitiki eliphansi, noma awakwazi ukumelana nokuguqulwa kwepulasitiki ngaphansi kwezimo ezivamile, futhi abonise ukuqina okungenamandla kanye nokuqina.

I-1, izinga lokushisa le-plastic-brittle transition

Ukonakala nokuqina kwento kushintsha ngokwezinga lokushisa. Imsulwa ebangeni lokushisa le-plastic-brittle transition (DBTT), okungukuthi, ingakhubazeka ngokwepulasitiki ngaphansi kwengcindezi ephezulu ngaphezu kwaleli banga lokushisa, ibonise ukuqina okuhle. Izinhlobo ezahlukene zokuphuka kwe-brittle zivame ukwenzeka ngesikhathi sokucubungula ukuguqulwa ngaphansi kwalolu banga lokushisa. Izinsimbi ezihlukene zinezinga lokushisa elihlukile le-plastic-brittle transition, i-tungsten ivamise ukuba ngu-400 ° C, kanti i-molybdenum iseduze nezinga lokushisa legumbi. Izinga lokushisa eliphakeme le-plastic-brittle transition liyisici esibalulekile sokuqina kwezinto ezibonakalayo. Izici ezithinta i-DBTT yizici ezithinta ukuphuka kwe-brittle. Noma yiziphi izici ezikhuthaza ukonakala kwezinto zizokhuphula i-DBTT. Izinyathelo zokunciphisa i-DBTT ziwukunqoba ukonakala kanye nokwanda. Izinyathelo zokuqina.

Izici ezithinta izinga lokushisa le-plastic-brittle transition of the material ubumsulwa, usayizi wokusanhlamvu, izinga lokuguquguquka, isimo sokucindezeleka kanye nezici ze-alloying zezinto.

I-2, izinga lokushisa eliphansi (noma izinga lokushisa legumbi) ukubukeka kabusha kwe-recrystallization brittleness

Izinto ze-tungsten zezimboni kanye ne-molybdenum kuhulumeni owenziwe kabusha zibonisa impatho yemishini ehluke ngokuphelele kusukela embonini ehlanzekile ye-cubic copper kanye nezinto ze-aluminium ezisezingeni lokushisa elijwayelekile. Izinto zethusi ezikhiqizwe kabusha nezihlanganisiwe zakha ukwakheka okusanhlamvu okulinganayo okulinganayo, okunokwakheka kwepulasitiki okuhle kakhulu kwezinga lokushisa kwegumbi futhi kungacutshungulwa ngokungekho emthethweni kube into esezingeni lokushisa elilingana negumbi, futhi i-tungsten ne-molybdenum zibonisa ukonakala okunzima ekamelweni lokushisa ngemva kokwenziwa kabusha kwekristalu. Izinhlobo ezahlukahlukene zokuphuka kwe-brittle zenziwa kalula ngesikhathi sokucubungula nokusetshenziswa.