Huiqin Wang , Bin Tang , Yudong Chu , Xiaofei Chen , Yilei Wang , Biao Ma , Jinshan Li
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Microstructure evolution and mechanical properties of Ti-46.5Al-4Nb-1Cr-0.2Ta alloy during near-isothermal forging at α single-phase region
For TiAl alloys, forging in the α single-phase region is an important and efficient method to obtain fine lamellar structure. In this study, Ti-46.5Al-4Nb-1.8Cr-0.2Ta (at.%) alloy was fabricated using direct single-pass forging near α transition temperature (α-DSPF), the microstructure evolution and mechanical properties were investigated. The results show that the refined near lamellar structures were obtained by means of recrystallization of α phase through near-isothermal forging at 1390 °C. Finally, the yield strength, ultimate tensile strength and elongation of the as-forged alloy at 1390 °C were simultaneously improved due to the improvement of lamellar fraction, refinement of grain size and reduction of the βo phase. This work provides a promising and cost-effective method for α-processing of TiAl alloys to improve the mechanical properties.
期刊介绍：
This journal is a platform for publishing innovative research and overviews for advancing our understanding of the structure, property, and functionality of complex metallic alloys, including intermetallics, metallic glasses, and high entropy alloys.
The journal reports the science and engineering of metallic materials in the following aspects:
Theories and experiments which address the relationship between property and structure in all length scales.
Physical modeling and numerical simulations which provide a comprehensive understanding of experimental observations.
Stimulated methodologies to characterize the structure and chemistry of materials that correlate the properties.
Technological applications resulting from the understanding of property-structure relationship in materials.
Novel and cutting-edge results warranting rapid communication.
The journal also publishes special issues on selected topics and overviews by invitation only.
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