Mechanical properties of additive manufactured titanium (Ti-6Al-4V) blocks deposited by a solid-state laser and wire
Mechanical properties of additive manufactured titanium (Ti-6Al-4V) blocks deposited by a solid-state laser and wire
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DOI：
10.1016/j.matdes.2011.06.062
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发表时间：
2011-12-01
影响因子：
8.4
通讯作者：
Leyens, Christoph
中科院分区：
文献类型：
--
作者：
Brandl, Erhard;Palm, Frank;Leyens, Christoph
本文研究了增材制造的Ti-6Al-4V块的机械性能和化学成分，并与板材和航空航天规范进行了比较。使用3.5 kW Nd：YAG激光器和Ti-6Al-4V线沉积块（7个珠宽，7层高，165 mm长）。使用两组不同的工艺参数，并研究了存款的三种不同条件（竣工，600摄氏度/4小时，1200摄氏度/2小时）。块体的特定杂质水平远低于根据航空航天材料规范（AMS 4911 L）容许的水平。从沉积方向上的块中提取静态拉伸样品，并在构建方向上提取冲压样品。实验表明，沉积态Ti-6Al-4V可以实现满足锻造Ti-6Al-4V材料（AMS 4928）的航空航天规格的强度和延展性。600摄氏度/4小时热处理导致在沉积方向上的显著更高的强度，但也会降低延展性。1200 ℃/2 h处理倾向于降低合金的强度。(C)2011爱思唯尔有限公司版权所有。
In this paper, the mechanical properties and chemical composition of additive manufactured Ti-6Al-4V blocks are investigated and compared to plate material and aerospace specifications. Blocks (seven beads wide, seven layers high, 165 mm long) were deposited using a 3.5 kW Nd:YAG laser and Ti-6Al-4V wire. Two different sets of process parameters are used and three different conditions (as-built, 600 degrees C/4 h, 1200 degrees C/2 h) of the deposit are investigated. The particular impurity levels of the blocks are considerably below those tolerated according to aerospace material specifications (AMS 4911L). Static tensile samples are extracted from the blocks in the deposition direction and punch samples are extracted in the building direction. The experiments show that as-deposited Ti-6Al-4V can achieve strength and ductility properties that fulfill aerospace specifications of the wrought Ti-6Al-4V material (AMS 4928). The 600 degrees C/4 h heat treatment leads to a significantly higher strength in the deposition direction, but can also decrease ductility. The 1200 degrees C/2 h treatment tends to decrease the alloy's strength. (C) 2011 Elsevier Ltd. All rights reserved.