Dab tsi yog cov yam ntxwv ntawm titanium?
1, Lub rigidity ntawm unadulterated titanium yog 265 ~ 353MPa, thiab elasticity ntawm titanium compounds yog 686 ~ 1176MPa, tam sim no mus txog 1764MPa. Titanium compounds yog qhov tseem ceeb ntawm lub zog rau ntau qhov kev npaj, txawm li cas los xij lub zog tshwj xeeb ntawm cov hlau yog nyob deb-par piv rau titanium amalgams.
2, Lub zog compressive ntawm titanium thiab titanium composites tsis yog raws nraim nws rigidity. Lub compressive yield zog thiab malleable yield zog ntawm niaj hnub unadulterated titanium nyob ib ncig ntawm sib npaug, thaum lub compressive zog ntawm Ti-6AI-4V thiab Ti-5AI-2.5Sn yog marginally siab tshaj qhov elasticity.
3, Shear zog feem ntau yog li ntawm 60% mus rau 70% ntawm tensile zog. Lub compressive yield zog ntawm titanium thiab titanium composite daim hlau yog nyob ib ncig ntawm 1.2 mus rau 2.0 npaug ntawm rigidity.
4, Nyob rau hauv ib puag ncig huab cua, qhov ruaj khov tshaj plaws mus txog ntawm titanium thiab titanium compounds tom qab tuav thiab tempering yog 0.5 rau 0.65 elasticity. Thaum ua tiav 10 lab qhov kev xeem tsis muaj zog hauv lub xeev tau qhab nia (Kt=3.9), qhov kev sib tw siab tshaj plaws ncav cuag ntawm tempered Ti-6AI-4V yog 0.2 npaug ntawm qhov rigidity .
5, Qib siab purity siab tshaj plaws ntawm kev lag luam ntshiab titanium feem ntau muaj qhov hardness tsawg dua 120HB (Brinnell hardness), thaum lwm yam kev lag luam ntshiab titanium muaj hardness ntawm 200 thiab 295HB. Lub hardness ntawm unadulterated titanium castings yog 200 ~ 220HB. Lub hardness tsim nyog ntawm titanium ua ke hauv lub xeev muaj zog yog 32 ~ 38HRC (Rockwell), uas yog piv rau 298 ~ 349HB. Lub hardness ntawm as-projected Ti-5Al{12}}.5Sn thiab Ti-6AI-4V castings yog 320HB, thiab lub hardness ntawm low-qhov debasement Ti{{18 }}Al-4V castings yog 310HB.
6, Lub ductile hloov tau hloov pauv ntawm cov niaj hnub unadulterated titanium yog 105 ~ 109GPa. Lub malleable hloov tau yooj yim modulus ntawm feem ntau titanium amalgams nyob rau hauv lub xeev toughened yog 110 ~ 120GPa. Lub malleable ntau yam modulus qub txaus solidified titanium compound yog marginally siab tshaj ntawm lub xeev tempered, thiab cov compressive saj zawg zog modulus yog sib npaug los yog ntau tshaj li lub pliable saj zawg zog modulus. Thib ob tsuas yog rau beryllium, molybdenum, thiab qee qhov kub-kub alloys, titanium alloy qhov tshwj xeeb elastic modulus yog piv rau aluminium alloy.
7, Qhov sib tw los yog shear modulus ntawm niaj hnub unadulterated titanium yog 46GPa, thiab shear modulus ntawm titanium amalgam yog 43 ~ 51GPa. Txhawm rau ua haujlwm ntawm lub zog ntawm titanium composites, nthuav cov ntsiab lus ntawm lub qhov yuav tsis zoo cuam tshuam rau qhov cuam tshuam cuam tshuam thiab tawg ruaj khov ntawm amalgam. Charpy notch cuam tshuam lub zog tus nqi ntawm denatured muaj ntshiab titanium yog 1554J / m2, thiab lub xeev cam khwb cia tus nqi yog kwv yees li 410J / m2, nyob ntawm seb hom thiab lub xeev ntawm cov titanium alloy. Cov nyhuv zog ntawm titanium composite nyob rau hauv tempered lub xeev yog 13 ~ 25.8J / ㎡, thiab lub maturing xeev yog marginally qis. Lub Charpy V-score cuam tshuam lub zog ntawm Ti-5AI-2.5Sn nyob rau hauv lub xeev cam khwb cia yog 10J/㎡, thiab ntawm Ti-6AI-4V yog 20~ 23 J/㎡. Qhov qis dua cov pa oxygen ntawm titanium compound, qhov ntau dua qhov tsim nyog yuav yog.
8, Ntau cov titanium tebchaw muaj lub zog tawg siab, lossis thaum kawg ntawm lub hnub, titanium kev sib txuas muaj kev tiv thaiv zoo los ntawm kev tawg. Tempered Ti-6AI-4V yog cov khoom siv nrog lub zog ci ntsa iab. Ntawm qhov taw tes thaum lub indent fixation coefficient Kt =25.4mm, qhov feem ntawm cov qhab nias elasticity rau unnotched rigidity yog ntau noteworthy tshaj 1.
9, Titanium kev sib xyaw ua ke tuaj yeem ua tau raws li cov khoom tshwj xeeb ntawm qhov kub thiab txias. Rau feem ntau, niaj hnub titanium kev sib xyaw ua ke tuaj yeem ua nrog lawv cov khoom ntawm qhov kub ntawm 540 degree, tab sis lawv yuav tsum tau siv rau lub sijhawm luv luv. Qhov kub thiab txias uas tuaj yeem siv rau ib ntus yog 450 ~ 480 degree. Thaum kub ntawm 600 degree, titanium alloys tau tsim los siv. Titanium alloy tuaj yeem siv los ua cov khoom siv foob pob hluav taws kub ntawm 540 degree rau lub sijhawm ntev thiab 760 degree rau lub sijhawm luv. Cov khoom kub kub ntawm ob peb titanium composites tau tshwm sim.
10, Txawm tias qhov kub thiab txias heev, titanium thiab nws cov alloys tseem tuaj yeem tuav lawv cov khoom qub qub. Raws li qhov kub thiab txias zuj zus, lub zog ntawm titanium thiab titanium amalgams txuas ntxiv nthuav dav, txawm li cas los xij, kev siv ntau yam tsis tu ncua. Ntau cov titanium toughened composites kuj muaj cov malleability txaus thiab tawg lub zog ntawm - 195.5 degree . Ti-5AI-2.5Sn muaj cov ntsiab lus cuam tshuam tsis txaus ntseeg thiab tuaj yeem siv tau ntawm - 252.7 degree . Qhov feem ntawm indented rigidity rau unnotched elasticity ntawm - 25.7 degree yog 0.95 ~ 1.15.
Cov kua dej oxygen, kua hydrogen thiab kua fluorine yog cov nqi tseem ceeb rau cov foob pob hluav taws thiab cov khoom siv hauv chaw. Cryogenic structural qhov chaw thiab cov thawv roj cryogenic cia siab rau cov ntaub ntawv uas muaj qhov kub thiab txias. Thaum lub microstructure yog equiaxed thiab cov khoom ntawm interstitial Cheebtsam (oxygen, helium, hydrogen, thiab lwm yam.) yog tsis tshua muaj heev, versatility ntawm titanium composite tseem yog siab tshaj 5%. Ntawm -252.7 degree, feem ntau cov titanium alloys tsis zoo, thiab Ti-6AI-4V muaj 12% elongation.
