Microstructure and Electrochemical Corrosion Behavior of TC4 Titanium Alloy Cladding Layer Prepared with Powder Feeding Laser Additive Manufacturing

2019 ◽  
Vol 46 (3) ◽  
pp. 0302003 ◽  
Author(s):  
冯晓甜 Feng Xiaotian ◽  
顾宏 Gu Hong ◽  
周圣丰 Zhou Shengfeng ◽  
雷剑波 Lei Jianbo
Keyword(s):  
Titanium Alloy ◽  
Additive Manufacturing ◽  
Corrosion Behavior ◽  
Electrochemical Corrosion ◽  
Laser Additive Manufacturing ◽  
Cladding Layer ◽  
Tc4 Titanium Alloy ◽  
Electrochemical Corrosion Behavior ◽  
Powder Feeding

scholarly journals In-Situ SEM Study on Deformation and Failure Mechanism of TC4 Titanium Alloy by Laser Additive Manufacturing

2020 ◽  
Vol 38 (5) ◽  
pp. 1025-1029
Author(s):  
Shuangyin Zhang ◽  
Tao Suo ◽  
Yulong Li
Keyword(s):  
Titanium Alloy ◽  
Additive Manufacturing ◽  
Grain Growth ◽  
Growth Direction ◽  
Laser Additive Manufacturing ◽  
Tensile Direction ◽  
Tc4 Titanium Alloy ◽  
Slip Bands ◽  
Α Phase

The in-situ tensile test of the field emission scanning electron microscope was used to study the deformation mechanism of the TC4 titanium alloy manufactured by laser additive manufacturing along the L direction (grain growth direction) and T direction (perpendicular to the grain growth direction). The test results show that during the tensile process, as deposited specimen mainly cracks along the interfaces of α and β which is 45 ° to the tensile direction. With the increase of load, the cracking increases. The surface of the sample fluctuates until breaks. There is no obvious change in the prior β grain boundary in L direction. The microcracks along grain boundaries were observed in T direction, which is consistent with the result that the plasticity in the T direction is less than that in L direction. After heat treatment, due to the increase of α lath width compared with the as-deposition, slip bands were observed in α phase. However, a large number of slip bands appear on the equiaxed α phase of the forged specimen.

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