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SUMMARY:Finite element modelling of hot compression testing of titanium al
 loys - Dr Patryk Jedrasiak\, CUED
DTSTART:20210430T130000Z
DTEND:20210430T133000Z
UID:TALK155068@talks.cam.ac.uk
CONTACT:Hilde Hambro
DESCRIPTION:This talk presents experimental results and finite element ana
 lysis of hot upsetting of titanium alloys Ti64 and Ti407 using three alter
 native thermomechanical testing systems\, Dilatometer DIL805A/T/D\, Gleebl
 e 3500\, and Servotest TMTS. All samples showed barrelling\, as a conseque
 nce of an inhomogeneous temperature distribution and friction. The FE mode
 l incorporated a full thermal model of the test calibrated using multiple 
 thermocouples. At each nominal temperature and strain-rate\, the differenc
 e between the FE input constitutive response and the predicted test output
  is used to correct the experimental true flow stress-strain curves. The a
 nalysis applies new procedures for: (i) finding the correction for inhomog
 eneity using literature data as input to the FE analysis\; (ii) smoothing 
 the constitutive data. The corrected model predicts the distribution of lo
 cal deformation conditions\, for application in interpretation of microstr
 ucture and texture evolution. This highlights the difference between nomin
 al and actual test conditions\, with the central strain and strain-rate be
 ing magnified by factors of 2–3. 
LOCATION:Zoom Meeting ID: 867 5602 4340
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