I-Zirconium 705 i-alloy material properties

Ziziphi izinto eziphathekayo ze-zirconium 705 alloy?

I-Zirconium ine-thermal ephantsi yokufunxa i-neutron cross-section, amandla aphezulu kunye nokuqina, ukumelana nokugqwesa okugqwesileyo, kunye ne-ductility. Isetyenziswa kakhulu kwimimandla yeshishini lamandla e-atom, i-aerospace, kunye ne-biomedicine. Yimathiriyeli ebalulekileyo yeqhinga, ekwabizwa ngokuba "yinombolo enye yesinyithi yexesha leathom." Ukwandisa ngakumbi ukuzinza kwe ukusetyenziswa kwe-zirconium alloys kunye nokunciphisa ubunzima ekuqhubeni nasekuveliseni, kubalulekile ukudibanisa i-zirconium alloy materials. Ke ngoko, kubalulekile ukufunda ubume kunye neepropathi zokudityaniswa kwe-alloy ephindwe kabini emva kokwenza itekhnoloji ye-welding, kunye ne-diffusion welding yindlela eqhelekileyo yokudibanisa izinto enokusetyenziselwa ukuwelda i-zirconium kunye ne-zirconium alloys.

I-Zr705 ingxubevange ye-zirconium yayisetyenziswe njengento esisiseko, i-Cu yongezwa njengoluhlu oluphakathi, kunye ne-vacuum diffusion welding yenziwa phantsi kweemeko ezahlukeneyo. Iziphumo zobukhulu be-Cu ephakathi kunye nobushushu be-welding kwi-microstructure kunye neempawu ze-mechanical ze-diffusion welded joint zafundwa kakhulu. Amalungu kwaxoxwa ngawo. Indlela yokwakheka; ukongeza, ukuxhathisa komhlwa kwamalungu kwizisombululo ezineasidi yavavanywa ngokuntywiliselwa kwimifuniselo ye-corrosion, kunye nokumelana nomhlwa kwamalungu adityanisiweyo afunyenwe phantsi kobunzima obuphakathi obuphakathi kunye namaqondo obushushu e-welding. Iziphumo zibonisa:

① Emva kokongeza i-Cu foil njengomaleko ophakathi, xa ubukhulu be-Cu foil yi-30μm-ubushushu be-welding 900>920 °C kunye nobukhulu be-Cu foil yi-10μm-welding ye-welding 880, 900, 920 ° C, ujongano lwenziwa kufutshane nesiseko. metal Kukho izakhiwo ezimbini zombutho, Widmanstatten isakhiwo, kunye nolwakhiwo lwezigaba ezimbini, ezinokubangelwa kukusasazwa kweeathom zeCu. Xa iqondo lobushushu lidlula i-920 °C kwaye lifikelela kuma-940 okanye ama-960°C, iqondo lobushushu apho i-a->p iguqulwa ngokupheleleyo ifikelelwe, kwaye yonke isiseko semathiriyeli yesakhiwo sisakhiwo seWidmanstatten.

② Xa iCu foil ubukhulu yi-30μm - ubushushu be-welding 900, 920% kunye nobukhulu be-Cu foil 10μm. Ukushisa kwe-Welding 880.900 ° C, i-layer ye-intermetallic compound yenziwa kwi-joint, kwaye le ngqungquthela ye-compound iqulethe i-Zr2Cu.Zri4Cu5i> ZrCu>ZrCu5 kunye ne-Zr3Cu8 izigaba kunye nezigaba ze-Zr7Cuio kunye ne-Zr8Cu5 zingabakho. Ukongezelela, xa usebenzisa i-Cu kunye nobukhulu be-10 μm njengoluhlu oluphakathi kwiqondo lokushisa elifanayo (920 ° C), akukho zixhobo ze-intermetallic ezenziwe, ezibonisa ukuba ubukhulu be-foil yobhedu bunempembelelo ethile kwi-interfacial chemical reaction. Xa kunyuswa iqondo lobushushu lokuthengisela ukuya kuma-940 °C kunye nama-960 °C. (Ngexesha le-2, akukho maleko ekhompawundi yesinyithi eyenziwe kumalungu apho i-Cu enobunzima be-30pm okanye i-10pm yongezwa njengomaleko ophakathi. Isizathu sinokuthi ubushushu be-welding bukhawulezise izinga lokusasazwa kunye nomgama we-athomu ze-Cu ukuya kwi-athomu. I-matrix Zr, kunye ne-athom ze-Cu zaziqinile. Inyibilikile kwi-matrix Zr, indawo ebanzi ye-Zr-Cu yesisombululo esomeleleyo ekugqibeleni yenziwe.

③ Kubukhulu be-30μmCu foil, amandla okuqina aphezulu ngokuthe ngcembe anyuka ngokunyuka kwamaqondo obushushu, kwaye ulwandiso luyanda kuqala luze luhle, emva koko iqondo lobushushu libe ngama-940 °C; kubukhulu be-10μmCu foil, amandla aphezulu kunye nobude be-elongation zombini Iipropati ze-mechanical ze-joints ezenza i-compound layer zihlwempuzekile, ezimele zibe ngenxa yesigaba esinzima se-intermetallic compound. Iipropati zomatshini zamalungu ngaphandle kwekhompawundi ye-metal intermetallic ziphuculwa kakhulu xa ubushushu bungama-940 °C. Xa, awona mandla aphezulu kunye nobude bejoyinti ayewona aphezulu phakathi kwabo bonke ubukhulu, kwaye anyuke ukusuka kwi-576MPa kunye ne-23% kwi-30μm ukuya ku-580MPa kunye ne-32% kwi-10μm (isiseko semathiriyeli ye-original 585MPa kunye ne-44%).

Isantya sokutya kwe i-zirconium alloy kulwelo oluneasidi edlekayo lungaphantsi kwe-0.5%/h. Ukususela kumbono we-corrosion micromorphology, ukuxhathisa kwe-corrosion kukuba: izinto ezisisiseko ze-post-weld> indawo ye-weld ngaphandle kwe-compound layer> isiseko sesiseko sokuqala> i-compound layer Weld; ukusuka kumbono wezinga lokubola kunye nesantya sokulahlekelwa kwesisindo, izinga lokubola kunye nesantya sokulahlekelwa kwesisindo sezinto zokuqala zesiseko ziphezulu, kunye nezinga lokulahlekelwa kwesisindo lifikelela kwi-44%. Njengoko ukushisa kwe-welding kwandisa, izinga lokubola liyancipha kwaye izinga lokulahleka kwesisindo liyancipha.