Cov nyhuv ntawm Thermomechanical ua ntawm Microstructure kho ntawm Ti600 Titanium Alloy

Nrog rau kev loj hlob sai ntawm kev lag luam aviation, txhawm rau kom tau raws li qhov yuav tsum muaj ntawm lub ntiaj teb tshiab kev sib tw rau kev siv titanium alloys rau kev siv ntev txog 600 degree. Tam sim no, kev txhim kho ntawm cov kev kub-kub titanium alloys feem ntau yog} cov kev ua haujlwm zri, cov teb chaws tau tsim ntau qhov kev ua tau zoo rau kev siv ntawm 600 degree, Thiab cov koob no ntawm alloys tau raug pov thawj los ua qhov kev vam meej tshaj plaws ntawm alloy-alloy tsim los ntawm kev tshawb fawb NorthwoTwest, thiab nws yog tsim rau daim ntawv thov yuav tsum muaj cov av aviation. Lub Ti600 Alloy yog ib qho ze-alpha hom high-kub titorwest los ntawm Northwrowrod Cov Hlau Kev Tshawb Fawb Cov Khoom Siv, uas yog tsim rau Aerospace cav. Nws muaj pes tsawg leeg yog ua raws li cov txheej txheem alloy saum toj no nrog kev sib ntxiv ntawm cov qauv tsis tshua muaj zog rau cov khoom siv hluav taws xob rau cov khoom siv hluav taws xob siab, thiab yog li ntawd yuav dhau los ua ib qho khoom siv aerospace. Rau kev tsim cov khoom tshwj xeeb zoo li cov khoom siv compressor thiab tawg, nws yog qhov tsim nyog kom tswj tau microstructure-neeg kho vaj yam ntxwv. Yog li ntawd, kom meej meej kev sib raug zoo ntawm microstructure thiab thermomechical ua cov tsis tseem ceeb rau kev tsim cov Ti600 titanium alloys.

Cov khoom siv rau kev xeem yog Ti600 titanium alloy nrog nominal muaj pes tsawg leeg ntawm (wt.%) Ti-6Al-2.8Sn-4Zr -0.5Mo-0.4Si-0.1Y, thiab nws qhov kev hloov pauv kub yog li 1010 degree . Cov khoom siv rau kev xeem yog Ti600 titanium alloy nrog nominal muaj pes tsawg leeg ntawm (wt.%) Ti-6Al-2.8Sn-4Zr-0.5Mo{{20 }}.4Si-0.1Y. Ti600 alloy bars nyob rau hauv raws li-xa khoom tau raug rau -phase cheeb tsam forging, thiab cov thawj microstructure muaj lamellae 30-40 μm ntev × 2 μm dav, thiab ib tug loj theem uas suav txog li 10% ntawm qhov zoo transformation. matrix. Isothermal compression tests tau ua nyob rau hauv lub computer-tswj Gleeble -1500 thermal simulator nrog lub deformation kub ntawm 800 txog 1100 degree, strain tus nqi ntawm 0.001, 0.01, 0.1, 1, thiab 10 s-1, thiab ib tug heev compressive qauv ntawm 70%. Tam sim ntawd tom qab thermal compression, cov qauv yog dej quenched los tiv thaiv lub tshav kub-deformed lub koom haum. Cov txiaj ntsig kev xeem tau pom tias:
Lub deformation kub muaj qhov cuam tshuam zoo rau ntawm microstructure. Ua ntawm qhov kub hauv qab no the -transition qhov kub (800 txog 950 degree), siv zog hloov kho kom pom tseeb tias qhov kub nce ntxiv. Machining ntawm qhov kub tshaj tshaj qhov ntsuas kub -tricition (1000 rau 1100 degree), elongation ntawm kev -rains tau tshwm sim hauv lub dav hlau sib tshuam. Qee qhov kev xaiv cov pob zeb me me marticitic flakes tau pom hauv cov nplej hloov pauv.
Tus nqi strain tag nrho cuam tshuam qhov deformation ntawm Ti600 alloy. Raws li tus nqi strain (0.1-10 s-1) nce, cov elongated flakes twisted ntau dua, thiab cov pob txha ntawm lub koom haum lamellar kom meej meej tshwm sim nyob rau hauv + kev ua haujlwm.
Lub tshuab muag hluav taws xob ntawm Ti600 Alloys Kub nias ntawm 1000 rau 1100 degree tsuas yog cov txheej txheem subclystals thiab cov phab ntsa microstration tau pom hauv tib theem.
Ua hauv thaj chaw theem + theem ntu (800 txog 950 degree) txo ob lub rheological kev ntxhov siab nrog kev nce kub thiab tsawg tus nqi. Qhov muag muag muag muag yog tsuas yog siv hluav taws xob zoo nkauj ntawm -sheets tsis pub dhau -Grains.