Age hardening and its modeling of Ti-2.5Cu alloy

作者：Song, Z. Y.; Sun, Q. Y.; Xiao, L.^*; Sun, J.; Zhang, L. C.; Guo, X. D.; Li, X. D.

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2013, 568: 118-122.

DOI：10.1016/j.msea.2013.01.003

• Ti-2.5Cu alloy
• Age hardening
• Strengthening mechanism
• Modeling

Age hardening behavior and relevant strengthening mechanisms of Ti-2.5Cu alloy have been investigated in detail. A transmission electron microscope (TEM) was used to investigate the microstructures of solution treated and two-stage aged Ti-2.5Cu specimens. It was observed that, Ti2Cu plates with three variants appeared in {1 (1) over bar 00} planes of alpha-Ti grains. The Orowan increment in critical resolved shear stress (CRSS) produced by the need for dislocations to by-pass Ti2Cu plates in three kinds of slip plane, i.e., {1 (1) over bar 00}, {0001} and {1 (1) over bar 01}, was analyzed respectively in detail. Based on these analyses, a strength model of aged Ti-2.5Cu alloy was established incorporating Orowan strengthening and solution strengthening mechanisms. The calculation results of this model met well with the measured values.

• 出版日期2013-4-15
• 单位西安交通大学; 淮阴工学院; 绍兴文理学院