Siv lub tshuab kuaj MTS thiab Hopkinson siab bar, quasi-static thiab dynamic compression kev ntsuam xyuas tau ua rau forged thiab laser sai tsim TC4 titanium alloy cylindrical specimens, thiab mechanics ntawm TC4 titanium alloy specimens npaj los ntawm ob txoj kev sib txawv ntau lawm tau muab piv rau kev soj ntsuam. kev coj cwj pwm, cov lus xaus yog raws li nram no:
(1) Lub microstructure thiab grain loj tsim los ntawm ob txoj kev sib txawv, laser sai prototyping thiab tsoos forging, yog txawv. Forging TC4-1# (forgingTC4-1#) muaj cov qauv equiaxed, thiab qhov nruab nrab cov nplej loj yog li 10~ 20μm, qhov loj tshaj plaws, qhov forged TC4-2# (forgingTC4-2#) pob tawb qauv, qhov nruab nrab qhov dav yog li 0. 35μm, lub laser nrawm prototyping TC4 (LRFTC4) yog ib rab koob me me zoo li pob tawb qauv, qhov nruab nrab lath dav yog txog 0 .2μm, qhov me me tshaj plaws, muaj cov kab nrib pleb thiab qhov ntawm qhov sib tshooj ntawm cov khoom siv.
(2) Muaj qhov sib txawv ntawm quasi-static thiab dynamic mechanical zog ntawm laser sai prototyping LRFTC4, forged TC4-1#, thiab forged TC4-2#. Qhov sib txawv ntawm cov qauv qauv morphology thiab grain loj uas tsim los ntawm cov txheej txheem sib txawv ua rau lawv mus rau qee yam. qhov sib txawv ntawm cov khoom siv kho tshuab.
(3) Raws li quasi-static compression deformation, forged TC 4-1# equiaxed qauv qauv qhia qhov zoo tshaj plaws plasticity thiab lub zog, thiab qhia tau hais tias muaj zog straining nyhuv. Lub zog thiab plasticity ntawm forged TC4-2 # pob tawb qauv thiab LRFTC4 tso pob tawb qauv qauv yog sib npaug, tab sis cov strain reinforcing nyhuv tsis muaj zog.
(4) Nyob rau hauv dynamic compression deformation, forged TC 4-1# equiaxed qauv qauv muaj qhov siab tshaj plaws txaus siab thiab strain. Lub forged TC 4-2# pob tawb qauv thiab LRFTC4 laser ceev deposition pob tawb qauv muaj tib yam yas, tab sis lub qub Lub dynamic flow stress yog siab dua tom kawg. Qhov kub tsis sib xws ntawm LRFTC4 qhov nrawm nrawm thiab txias muaj qhov cuam tshuam tsis zoo rau cov khoom siv kho tshuab. Rau qee qhov, cov khoom siv hluav taws xob zoo ntawm LRFTC4 tso cov pob tawb qauv piv txwv tsis zoo rau cov forged TC4-2# pob tawb qauv qauv.
(5) Forged TC4-1#, forged TC4-2# thiab LRFTC4 yog txhua yam strain rate rhiab cov ntaub ntawv, tab sis cov strain rate cuam tshuam txawv; ntawm peb cov ntaub ntawv, forged TC4-2# pob tawb qauv qauv qhia qhov siab tshaj plaws strain rate Sensitivity, strain rate rhiab heev ntawm LRFTC4 pob tawb qauv qauv yog qhov tsis muaj zog tshaj, thiab rhiab heev ntawm forged TC4-1 # equiaxed qauv qauv yog nruab nrab ntawm ob.
