Microstructure and mechanical properties of a novel near-α titanium alloy Ti6.0Al4.5Cr1.5Mn

作者：Wang, Hong-bin; Wang, Shu-sen; Gao, Peng-yue; Jiang, Tao; Lu, Xiong-gang; Li, Chong-he^*

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2016, 672: 170-174.

DOI：10.1016/j.msea.2016.06.083

• Near-alpha titanium alloy
• Water-cooled copper crucible
• Microstructure and performance
• Laves phase

Based on previous Ti-Al-Cr-Mn quaternary system thermodynamic database, a novel near-alpha titanium alloy Ti-6.0Al-4.5Cr-1.5Mn alloy was designed and successfully prepared by the water-cooled copper crucible. Microscopic observation showed that both as-cast and annealing status consist of a phase, which coincides with the theoretical expectation. The mechanical properties at room temperature were measured and this alloy possesses good mechanical properties, its average yield-strength reaches 1051.5 MPa and tensile-strength is up to 1091.2 MPa while its average elongation is just 8.3%. Compared with the TA15, it has better mechanical strength and worse elongation. In the new alloy Laves phase Cr2Ti were detected by XRD pattern and TEM, which may cause the alloy's poor plasticity.

• 出版日期2016-8-30
• 单位上海大学