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Journal of Materials Engineering and Performance
Erschienen in: Journal of Materials Engineering and Performance 12/2022

07.06.2022 | Technical Article

Hot Workability and Microstructural Evolution of Powder Metallurgy Ti-22Al-24Nb-0.5Mo Alloy during Hot Compression

verfasst von: Zichao Yu, Hua Zhang, Zhengjie Shao, Shangzhou Zhang, Jingjing Ruan, Lifei Wang, Xin Zhou, Lilong Zhu, Lei Xu

Erschienen in: Journal of Materials Engineering and Performance | Ausgabe 12/2022

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Abstract

In this work, Ti-22Al-24Nb-0.5Mo alloy was processed by hot isostatic pressing and forging. The hot workability and microstructure evolution of forged alloy at temperature of 930-1050 °C and the strain rate of 0.001‐1 s−1 were investigated. The flow stress of forged alloy decreased with the increasing temperature and the decreasing strain rate. When the compression strain rate is greater than 0.1 s−1, the stress–strain curves present multiple yield phenomenon. The apparent activation energy Q values of forged alloy in the (α2+O+B2) three-phase region and the (α2+B2) two-phase region are 727 and 571 KJ mol−1, respectively. According to hot working map, there are no suitable processing zone in the three-phase region. There are two suitable processing zones (Domain I: 990-1030 °C and 0.005 s−1; Domain II: above 1035 °C and 0.1‐0.005 s−1) in the two-phase region, in which there are many dynamic recrystallized grains and the continuous dynamic recrystallization is the dominating dynamic recrystallization (DRX) mechanism. But the grains are severely deformed and the discontinuous dynamic recrystallization is activated in the instability zone.
Vorheriger Artikel Increase in Mechanical Properties and Damping Capacity of a Cast Mn-Cu Damping Alloy Welded Joint by Pulsed Current TIG Welding
Nächster Artikel Through-Thickness Fiber Formation Integrated into Carbon-Fiber-Reinforced Thermoplastic Laminate Welding Method

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Metadaten
Titel
Hot Workability and Microstructural Evolution of Powder Metallurgy Ti-22Al-24Nb-0.5Mo Alloy during Hot Compression
verfasst von
Zichao Yu
Hua Zhang
Zhengjie Shao
Shangzhou Zhang
Jingjing Ruan
Lifei Wang
Xin Zhou
Lilong Zhu
Lei Xu
Publikationsdatum
07.06.2022
Verlag
Springer US
Erschienen in
Journal of Materials Engineering and Performance / Ausgabe 12/2022
Print ISSN: 1059-9495
Elektronische ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-022-07007-9

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