Phase transformation sequence of Ti-6Al-4V as a function of the cooling rate

Ricardo Henrique Buzolin*, Desirée Weiß, Alfred Krumphals, Michael Lasnik, M. C. Poletti

*Korrespondierende/r Autor/in für diese Arbeit

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem Konferenzband

Abstract

The growth kinetics of allotriomorphic α along the prior β grain boundaries and of globular primary α in Ti-6Al-4V during continuous cooling is described. A physical model is developed based on classical nucleation and growth of platelets for the allotriomorphic α. The growth of the primary α is modelled based on the growth of spherical particle immerged on a supersaturated β-matrix. Continuous cooling tests at two different holding temperatures in the α+β field, 930°C and 960°C, and five different cooling rates, 10, 30, 40, 100 and 300°C/min, are conducted to validate the proposed models and elucidate the growth sequence of those α morphologies. Additionally, interrupted tests at different temperatures are conducted to determine the progress of growth of primary α and formation allotriomorphic α during cooling. The size of primary α increases while its size distribution broadens with a decrease in cooling rate. Area fractions of primary α decrease with increasing cooling rate and increasing holding temperature. Moreover, the lower the cooling rate, the thicker the plates of allotriomorphic α. At the beginning of the cooling, growth of primary α, as well as formation of allotriomorphic α plates is observed. The experimental and modelled results show good agreement.
Originalspracheenglisch
TitelMATEC Web of Conferences
Seitenumfang9
Band321
DOIs
PublikationsstatusVeröffentlicht - 12 Okt 2020
VeranstaltungThe 14th World Conference on Titanium - Nantes, Frankreich
Dauer: 10 Jun 201914 Jun 2019
https://www.titanium2019.com/

Konferenz

KonferenzThe 14th World Conference on Titanium
KurztitelTi-2019
LandFrankreich
OrtNantes
Zeitraum10/06/1914/06/19
Internetadresse

Fingerprint Untersuchen Sie die Forschungsthemen von „Phase transformation sequence of Ti-6Al-4V as a function of the cooling rate“. Zusammen bilden sie einen einzigartigen Fingerprint.

Dieses zitieren