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Friction welding of conventional Ti-6Al-4V alloy with a Ti-6Al-4V based metal matrix composite reinforced by TiC
Welding in the World ( IF 2.1 ) Pub Date : 2020-11-06 , DOI: 10.1007/s40194-020-01025-8
Sergey V. Prikhodko , Dmytro G. Savvakin , Pavlo E. Markovsky , Olexander O. Stasuk , James Penney , Norbert Enzinger , Michael Gaskill , Frank Deley

Titanium alloys are supreme structural materials primarily due to their high specific strength. However, their wide use is largely restrained by the high cost of raw titanium compared to other metals commonly used in structural alloys. Layered structures of titanium alloys allow substantial increase of the material utilisation ratio and therefore draw significant attention. The rational ways of layered parts fabrication are bonding or joining of individually optimised layers into a final complex structure. The use of friction welding to join the parts is one of the most attractive ways of achieving a desirable result, since it is a solid state and near-net-shape process that modifies the structure of connected parts only locally. The study goal was to validate feasibility of the layered structures of Ti-6Al-4V (Ti-64) alloy and metal matrix composite (MMC) on its base with 10% of TiC fabricated by rotary friction welding (RFW) and linear friction welding (LFW). Both initial structures, Ti-64 and MMC, were made using low-cost blended elemental powder metallurgy. RFW and LFW were successfully used to bond the sections of the alloy and its composite. TiC particles stabilise the structure and are not fragmented by friction welding under used processing parameters.



中文翻译:

传统Ti-6Al-4V合金与TiC增强的Ti-6Al-4V基金属基复合材料的摩擦焊接

钛合金是主要的结构材料,主要是因为它们具有较高的比强度。但是,与结构合金中通常使用的其他金属相比,粗钛的高成本极大地限制了它们的广泛使用。钛合金的层状结构使材料利用率大大提高,因此引起了极大的关注。分层零件制造的合理方法是将单独优化的层粘合或结合成最终的复杂结构。使用摩擦焊接来连接零件是获得理想结果的最有吸引力的方法之一,因为这是一种固态且接近最终形状的工艺,仅局部地改变了连接零件的结构。该研究目标是通过旋转摩擦焊接(RFW)和线性摩擦焊接来验证Ti-6Al-4V(Ti-64)合金和金属基复合材料(MMC)在其基础上含10%TiC的层状结构的可行性。 (LFW)。两种初始结构Ti-64和MMC均使用低成本的混合元素粉末冶金技术制成。RFW和LFW已成功用于粘结合金及其复合材料的截面。TiC颗粒可稳定结构,在使用的加工参数下不会因摩擦焊而碎裂。

更新日期:2020-11-06
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