Details

Autor(en) / Beteiligte

• Zhang, L.
• Wang, Q.
• Ren, J.Q.
• Xin, C.
• Chen, D.J.
• Lu, X.F.

Titel

Comparative study on the effect of test temperature on tensile and charpy impact properties of Ti–5Al–1V–1Sn–1Zr-0.8Mo alloy

Ist Teil von

• Materials science & engineering. A, Structural materials : properties, microstructure and processing, 2023-07, Vol.879, p.145231, Article 145231

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Impact toughness is a critical indicator to prevent catastrophic failure, especially at low service temperature. At present, most strategies to strengthen and toughen Ti alloys are proposed under the quasi-static tensile deformation condition. In fact, whether these strategies can be directly extended to improve impact toughness is still controversial due to the high loading rate and the existing of pre-notch during Charpy impact deformation condition. In this work, we found that, even though the yield strength and elongation of Ti–5Al–1V–1Sn–1Zr-0.8Mo alloy increase simultaneously with the decrease of test temperature under tensile deformation condition, the impact toughness still decreases gradually with the decreasing of deformation temperature under Charpy impact deformation condition. This phenomenon indicates that the successful strengthening and toughening strategies under quasi-static tensile deformation may fail under impact deformation. Finally, the reasons behind this phenomenon are explained based on the comparison of surface deformation morphologies under different deformation conditions, and the corresponding deformation mechanisms are established.