Mechanical zog ntawm titanium

1. Lub zog tensile ntawm ntshiab titanium yog 265 ~ 353MPa, thiab cov titanium alloys dav dav yog 686 ~ 1176MPa, tam sim no mus txog 1764MPa. Titanium alloys muaj zog npaum li ntau cov hlau, tab sis lub zog tshwj xeeb ntawm cov hlau tsis zoo dua li cov titanium alloys.

2. Lub zog compressive ntawm titanium thiab titanium alloys tsis tsawg dua nws lub zog tensile. Lub compressive yield zog thiab tensile yield zog ntawm industrial ntshiab titanium yog kwv yees li sib npaug, thaum lub zog compressive ntawm Ti-6AI-4V thiab Ti-5AI-2.5Sn yog me ntsis siab dua lub zog tensile.

3. Shear zog feem ntau yog 60 feem pua ​​​​rau 70 feem pua ​​ntawm tensile zog. Lub zog yield zog ntawm titanium thiab titanium alloy nplooj ntawv yog kwv yees li 1.2 txog 2.0 npaug ntawm lub zog tensile.

4. Nyob rau hauv ib txwm atmospheric cua, lub durability txwv ntawm cov txheej txheem thiab annealed titanium thiab titanium alloys yog 0.5 rau 0.65 tensile zog. Thaum raug mus rau 10 lab qhov kev sim qaug zog hauv lub xeev tsis muaj zog (Kt=3.9), qhov kev txwv tsis pub dhau ntawm Ti-6AI-4V yog 0.2 npaug ntawm tensile zog.

5. Lub hardness ntawm qib siab purity siab tshaj ntawm industrially ntshiab titanium feem ntau yog tsawg dua 120HB (Brinnell hardness), thiab hardness ntawm lwm yam industrially ntshiab titanium yog 200 txog 295HB. Lub hardness ntawm ntshiab titanium castings yog 200 ~ 220HB. Tus nqi hardness ntawm titanium alloy nyob rau hauv lub xeev annealed yog 32 ~ 38HRC (Rockwell), uas yog sib npaug rau 298 ~ 349HB. Lub hardness ntawm as-cast Ti-5Al{12}}.5Sn thiab Ti-6AI-4V yog 320HB, thiab lub hardness ntawm low-gap impurity Ti{18} }Al-4V castings yog 310HB.

6. Lub tensile elastic modulus ntawm industrial ntshiab titanium yog 105 ~ 109GPa. Lub tensile elastic modulus ntawm feem ntau titanium alloys nyob rau hauv lub xeev annealed yog 110 ~ 120GPa. Hnub nyoog-hardened titanium alloys muaj ib tug me ntsis siab tensile elastic modulus tshaj nyob rau hauv lub annealed lub xeev, thiab lub compressive elastic modulus yog sib npaug los yog ntau tshaj lub tensile elastic modulus. Qhov tshwj xeeb elastic modulus ntawm titanium alloy yog sib npaug ntawm aluminium alloy, thib ob tsuas yog beryllium, molybdenum thiab qee qhov kub-kub alloys.

7. Lub torsion los yog shear modulus ntawm industrial ntshiab titanium yog 46GPa, thiab shear modulus ntawm titanium alloy yog 43 ~ 51GPa. Txhawm rau txhim kho lub zog ntawm titanium alloys, nce qhov sib txawv ntawm cov ntsiab lus yuav muaj teeb meem cuam tshuam rau kev cuam tshuam thiab tawg toughness ntawm alloy. Nyob ntawm seb hom thiab lub xeev ntawm titanium alloy, Charpy notch cuam tshuam lub zog tus nqi ntawm denatured muaj ntshiab titanium yog 15 ~ 54J / ㎡, thiab nws yog hais txog 4 ~ 10J / ㎡ nyob rau hauv lub xeev casting. Qhov cuam tshuam lub zog ntawm titanium alloy nyob rau hauv lub xeev annealed yog 13 ~ 25.8J / ㎡, thiab hais tias nyob rau hauv lub hnub nyoog lub xeev yog me ntsis qis. Charpy V-notch 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 alloys, qhov ntau dua qhov nqi no.

8. Ntau cov titanium alloys muaj siab tawg toughness, los yog nyob rau hauv lwm yam lus, titanium alloys muaj zoo tsis kam mus tawg propagation. Annealed Ti-6AI-4V yog ib yam khoom uas zoo heev toughness. Thaum qhov ntsuas qhov sib npaug ntawm qhov sib npaug Kt =25.4 hli, qhov sib piv ntawm lub zog tensile rau qhov tsis muaj qhov tensile lub zog yog ntau dua 1.

9. Titanium alloys tuaj yeem tswj tau qee yam khoom ntawm qhov kub thiab txias. Feem ntau, kev lag luam titanium alloys tuaj yeem tswj hwm lawv cov khoom ntawm qhov kub ntawm 540 degree, tab sis lawv tuaj yeem siv rau lub sijhawm luv luv. Qhov ntsuas kub txaus rau lub sijhawm ntev yog 450 ~ 480 degree. Titanium alloys tau tsim los siv rau qhov kub ntawm 600 degree. Raws li cov khoom siv foob pob hluav taws, titanium alloy tuaj yeem siv rau ntawm qhov kub ntawm 540 degree rau lub sijhawm ntev thiab ntawm qhov kub ntawm 760 degree rau lub sijhawm luv luv.

10 ib. Titanium thiab titanium alloys tseem tuaj yeem tswj hwm lawv cov khoom qub qub ntawm qhov kub thiab txias. Raws li qhov kub thiab txias, lub zog ntawm titanium thiab titanium alloys tseem nce ntxiv, thaum lub ductility maj mam zuj zus. Ntau cov annealed titanium alloys kuj muaj txaus ductility thiab tawg toughness ntawm -195.5 degree . Ti-5AI-2.5Sn, uas muaj cov ntsiab lus qis qis heev, tuaj yeem siv tau ntawm -252.7 degree . Qhov sib piv ntawm nws lub zog tensile rau cov tsis-notched tensile lub zog yog 0.95 ~ 1.15 ntawm -25.7 degree .

Cov pa oxygen ua kua, kua hydrogen thiab kua fluorine yog ib qho tseem ceeb propellants nyob rau hauv missiles thiab qhov chaw. Cov khoom uas tsis tshua muaj kub ntawm cov khoom siv los ua cov thawv ntim roj cryogenic thiab cov khoom siv cryogenic yog qhov tseem ceeb heev. Thaum lub microstructure yog equiaxed thiab cov ntsiab lus ntawm interstitial cov ntsiab lus (oxygen, helium, hydrogen, thiab lwm yam) yog tsawg heev, ductility ntawm titanium alloys tseem siab tshaj 5 feem pua. Feem ntau cov titanium alloys tsis zoo ductility ntawm -252.7 degree, thaum lub elongation ntawm Ti-6AI-4V mus txog 12 feem pua.

Cov ntsiab lus saum toj no yog tsim los ntawm Titanium House