Negative strain rate sensitivity of a Ti-8Al-1Mo-1V alloy with bimodal microstructure under quasi-static compression
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In: Materials letters, Vol. 284.2021, No. Part 2, 128942, 01.02.2021.
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TY - JOUR
T1 - Negative strain rate sensitivity of a Ti-8Al-1Mo-1V alloy with bimodal microstructure under quasi-static compression
AU - SHI, Xiao hui
AU - FAN, Zhi yuan
AU - CAO, Zu han
AU - Qiao, J. W.
AU - Eckert, J.
PY - 2021/2/1
Y1 - 2021/2/1
N2 - The compression behavior of a Ti-8Al-1Mo-1 V alloy with bimodal microstructure has been studied in the strain rate range of 2 × 10-3 s−1-2 × 10-1 s−1. The strain rate sensitivity shows a positive–negative-positive changing tendency with increasing strain rate. Moreover, serrated flow behavior was found in the first two changing stages of the strain rate sensitivity. Dynamic strain aging caused by solute atom-dislocation interaction within ultrafine α/α' lamellae is proved to be responsible for the appearance of serrations as well as the negative strain rate sensitivity. The reasons for the other two stages of positive strain rate sensitivity have also been analyzed.
AB - The compression behavior of a Ti-8Al-1Mo-1 V alloy with bimodal microstructure has been studied in the strain rate range of 2 × 10-3 s−1-2 × 10-1 s−1. The strain rate sensitivity shows a positive–negative-positive changing tendency with increasing strain rate. Moreover, serrated flow behavior was found in the first two changing stages of the strain rate sensitivity. Dynamic strain aging caused by solute atom-dislocation interaction within ultrafine α/α' lamellae is proved to be responsible for the appearance of serrations as well as the negative strain rate sensitivity. The reasons for the other two stages of positive strain rate sensitivity have also been analyzed.
KW - DSA
KW - Metals and alloys
KW - Microstructure
KW - Negative strain rate sensitivity
KW - Serrations
KW - Titanium alloy
UR - http://www.scopus.com/inward/record.url?scp=85096163622&partnerID=8YFLogxK
U2 - 10.1016/j.matlet.2020.128942
DO - 10.1016/j.matlet.2020.128942
M3 - Article
AN - SCOPUS:85096163622
VL - 284.2021
JO - Materials letters
JF - Materials letters
SN - 0167-577X
IS - Part 2
M1 - 128942
ER -