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Open AccessArticle

Quantitative Relationships between Mechanical Properties and Microstructure of Ti17 Alloy after Thermomechanical Treatment

by Yan Han 1,2, Fei Zhao 1,2,*, Yuan Liu 1,2 and Chaowen Huang 1,2
1
College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China
2
Key Laboratory for Materials Structure and Strength of Guizhou province, Guiyang 550025, China
*
Author to whom correspondence should be addressed.
Metals 2020, 10(1), 67; https://doi.org/10.3390/met10010067
Received: 3 December 2019 / Revised: 22 December 2019 / Accepted: 27 December 2019 / Published: 1 January 2020
(This article belongs to the Special Issue Heat Treatment and Mechanical Properties of Metals and Alloys)
In this paper, the relationships between the thermomechanical treatments (TMT), the microstructural evolution the mechanical properties of Ti17 alloy were investigated. The results indicate the coarsening behavior of lamellar α was sensitive to the aging temperature during the process of TMT. The thickness of lamellar α changed from 0.19 to 0.38 μm with an increase in the aging temperature. Moreover, both tensile properties and impact toughness vary with the thickness of lamellar α. The tensile strength increases with the increase of the thickness of lamellar α the plasticity and impact toughness the opposite trend. The quantitative investigations found that there is a linear relationship between the tensile properties and the thickness of lamellar α the tensile properties could be adjusted in the range of 1191~1062 MPa and 1163~1039 MPa to obtain ultimate tensile strength and yield strength as well as 11~16% elongation and 23~33% reduction of area by varying the thickness of lamellar α. Meanwhile, the impact toughness could be adjusted in the range of 46 ~53 J/cm2. The high correlation coefficients imply that the linear equation is reliable to describe the relationships between the mechanical properties and the thickness of lamellar α for Ti17 alloy. View Full-Text
Keywords: Ti17 alloy; thermomechanical treatment; quantitative relationships; microstructure; mechanical properties Ti17 alloy; thermomechanical treatment; quantitative relationships; microstructure; mechanical properties
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Han, Y.; Zhao, F.; Liu, Y.; Huang, C. Quantitative Relationships between Mechanical Properties and Microstructure of Ti17 Alloy after Thermomechanical Treatment. Metals 2020, 10, 67.

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