Solution treatment at varying temperatures followed by water quenching resulted in tensile strength ranging from 908 to 921 MPa and % elongation varied from 19% to 26%. On the other hand, the argon quenching heat treatment resulted in tensile strength in the range of 871–955 MPa and % elongation from 9% to 25%.
Full Answer
Abstract
The effect of the solution treatment and aging (STA) conditions on the tensile properties of Ti–4 mass%Fe–4 mass%Al–0.25 mass%Si alloy has been investigated in this work.
1. Introduction
Ti alloys, such as Ti–6Al–4V, have been used in the aerospace and automotive industries due to their excellent specific strengths. However, in contrast to steel and Al materials, high production costs of Ti alloys make their large-scale commercialization very challenging [1].
2. Experimental
An ingot of Ti–4 mass%Al–4 mass%Fe–0.25 mass%Si–0.1 mass%O (TAFS) alloy was prepared by vacuum arc melting followed by forging in the β (upsetting forging at 1050 °C) and α+β (rotary forging at 880 °C) regimes, respectively.
4. Conclusions
The effect of STA condition on the phase transformation and mechanical properties have investigated by means of transmission electron microscopy, scanning electron microscopy, tensile test and hardness measurement in Ti–Al–Fe–Si alloy. The main conclusions are as follow:
Acknowledgments
This research was supported by the National Research Foundation of Korea [ 10062485] funded by the Ministry of Trade Industry and Energy.
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