Ukuhlaziywa kwemishini yokukhuthaza ukuqhekeka kulungele ukuqonda isizathu esibalulekile se-crack, okuyisisekelo esihlosiwe sokuhlonza uqhekeko. Kungaqashelwa ekuhlaziyweni kwe-crack case eminingi eqanjiwe kanye nokuhlola okuphindaphindiwe ukuthi indlela kanye nezici zensimbi ye-alloy forgings azilingani, ezinomonakalo oyinhloko wokuqhekeka.

1. Izinto zokusetshenziswa ezinomshini nezici ezilinganayo.

Kuyo yonke inqubo ye-deformation, ukuzivocavoca kwe-dislocation eduze kwendiza eslayidayo, futhi lapho ihlangana nokuvinjelwa komgwaqo, izonqwabelana futhi ibangele ukucindezeleka komhlabathi okwanele ukuze kubangele imifantu, noma i-cavitation kanye nama-micro-cracks ngenxa yokusebenzisana kwe-dislocation, ehlangene nomkhuba wokuthuthukiswa wokuqhekeka kwe-macro-economic. Le miphumela eyinhloko ekushiseni kwe-deformation iphansi (iphansi kunezinga lokushisa eliqinisa umsebenzi), noma izinga lokuguquguquka likhulu kakhulu, izinga lokuguqulwa lishesha kakhulu. Lolu hlobo of ufa ngokuvamile transgranular noma transgranular futhi intergranular exutshwe, kodwa ngenxa yokuthi izinga lokushisa eliphezulu ama-molecule anezinga eliphezulu ukusabalalisa kwangaphandle, kuvumelana ukukhuphuka dislocation, ukusheshisa ukukhanda forging kanye nomsebenzi lukhuni, ukuze inqubo deformation isivele yabangela crack micro kulula ukukhanda, in the deformation lokushisa efanelekayo, izinga lokuguquguquka alikwazi ukuthuthukisa umkhuba kancane macromic.

2. Izinto zokusetshenziswa ezinomshini nezici ezingalingani.

Okwezinto ezisetshenziswayo ezinezinqubo nezakhiwo ze-asymmetrical, ukuqhekeka kuvame ukuvela emingceleni yokusanhlamvu nakwamanye amakhasi esigaba. Lokhu kungenxa yokuthi i-deformation yokubumba ngokuvamile yenziwa eduze nezinga lokushisa elilinganayo lezinto zensimbi. Ukuguqulwa komngcele wokusanhlamvu kukhulu kakhulu, ngakho-ke umngcele wokusanhlamvu wezinto zensimbi uyingozi embonini ye-metallurgical, isigaba sesibili kanye nezinto ezingezona ezensimbi zigxilwe endaweni. Emazingeni okushisa aphezulu, i-low solubility point amakhemikhali emingceleni yokusanhlamvu kwezinye izinto ezingavuthiwe akhiqiza ukuncibilika, okuqinile.

Yehlisa ukuguqulwa kwepulasitiki yezinto zokusetshenziswa; Emazingeni okushisa aphezulu, ezinye izakhi (sulfure, ithusi, njll.) ezintweni ezizungezile zisakazwa eduze komngcele wokusanhlamvu ukuya ngaphakathi nangaphandle kwezinto zensimbi, okuholela ekubukekeni okungavamile kwesigaba sesibili kanye nokuba buthakathaka komngcele wokusanhlamvu. Kokunye, izinto ezivamile zensimbi zinokuhlangana okubi nezigaba ezithile ngenxa yomehluko wezakhiwo zomzimba nezamakhemikhali zalezi zigaba ezimbili.

Izinto zokusetshenziswa ezivame ukusetshenziswa ekufongeni ngokuvamile azilingani. Ngakho-ke, ukuqhekeka kwama-forgings amahhala kwenzeka futhi kukhule eduze komngcele wokusanhlamvu noma umngcele wesigaba ngesikhathi sokushisa okuphezulu okwenza ukuwohloka.