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Rare Metals

Erschienen in:

16.01.2017

Grain growth behavior of Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy during isothermal β heat treatments

verfasst von: De-Lai Ouyang, Hai-Ming Du, Xia Cui, Shi-Qiang Lu, Xian-Juan Dong

Erschienen in: Rare Metals | Ausgabe 3/2019

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Abstract

Isothermal β heat treatments of Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy were performed at the temperature of 1040–1240 °C to examine the influence of heating conditions on grain growth of the alloy. The results show that the grain size increases with heating temperature and holding time increasing. Rapid β grain growth of the alloy takes place at the temperature of over 1140 °C. The grain growth kinetics for the alloy follows the classical isothermal grain growth law. The growth time exponent (n) of 0.5651 and activation energy (Q) of 129.6 kJ·mol⁻¹ are determined. Finally, in order to determine the grain size under different heating conditions, the grain growth model of the alloy was established.

Vorheriger Artikel Low-cycle fatigue behavior of a directionally solidified Ni-based superalloy subjected to gas hot corrosion pre-exposure

Nächster Artikel Temperature stability of SmCo (2:17) magnets modified by Ni–Cr two-layer coating

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Titel: Grain growth behavior of Ti–6.5Al–3.5Mo–1.5Zr–0.3Si alloy during isothermal β heat treatments
verfasst von: De-Lai Ouyang
Hai-Ming Du
Xia Cui
Shi-Qiang Lu
Xian-Juan Dong
Publikationsdatum: 16.01.2017
Verlag: Nonferrous Metals Society of China
Erschienen in: Rare Metals / Ausgabe 3/2019
Print ISSN: 1001-0521
Elektronische ISSN: 1867-7185
DOI: https://doi.org/10.1007/s12598-016-0853-x

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