材料科学
残余应力
微观结构
均质化(气候)
金属间化合物
钛合金
沉积(地质)
维氏硬度试验
复合材料
压痕硬度
梯度材料
钛
材料性能
冶金
合金
古生物学
沉积物
生物
生物多样性
生态学
作者
Bin Chen,Tao Wang,Xin Xi,Caiwang Tan,Xiaoguo Song
出处
期刊:Rapid Prototyping Journal
[Emerald (MCB UP)]
日期:2022-08-30
卷期号:29 (3): 558-568
被引量:4
标识
DOI:10.1108/rpj-04-2022-0117
摘要
Purpose Ti-Al composite plates have been used in aerospace and other important fields for specific purposes in recent years. However, relatively few studies have concentrated on Ti-Al additive manufacturing because during additive manufacturing process the local fusion and mixing of Ti/Al are inevitable. These areas where Ti and Al are mixed locally, especially interface, could easily generate high residual stresses and cracks. This study aims to manufacture Ti-Al functionally graded material and investigate the interaction of interface. Design/methodology/approach In this study, Ti6Al4V/AlSi10Mg functionally graded materials were fabricated by laser based directed energy deposition (L-DED) and a strategy using V interlayer to relieve interfacial stress was investigated. Findings The area between the two materials was divided into transition zone (TZ) and remelting zone (RZ). The phase distribution, microstructure and micro-Vickers hardness of the TZ and RZ were investigated. Typical intermetallic compounds (IMCs) such as TiAl3, Ti3Al and Ti5Si3 were found in both composites. The addition of V interlayer promoted the homogenization of IMCs near interface and led to the formation of new phases like V5Si3 and Al3V. Originality/value The solidification process near the interface of Ti-Al functionally graded material and the possible generation of different phases were described. The result of this paper proved the feasibility of manufacturing Ti-Al functionally graded material by L-DED.
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