Strengthening behaviour and mechanisms of extruded powder metallurgy pure Ti materials reinforced with ubiquitous light elements
Strengthening behaviour and mechanisms of extruded powder metallurgy pure Ti materials reinforced with ubiquitous light elements
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DOI：
10.1080/00325899.2016.1148847
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发表时间：
2016-05
影响因子：
1.4
通讯作者：
Takanori Mimoto;J. Umeda;K. Kondoh
中科院分区：
文献类型：
--
作者：
Takanori Mimoto;J. Umeda;K. Kondoh
氧 (O)、氮 (N)、碳 (C) 和氢 (H) 等普遍存在的轻元素 (ULE) 可以成为实现粉末冶金 (PM) 钛 (Ti) 材料高比强度和成本效益的关键添加元素。它们具有很高的潜力，可用作钒 (V) 和铌 (Nb) 等传统昂贵合金元素的有用增强材料。在这项研究中，两种ULE，即氧和氢，通过粉末冶金途径被引入纯钛基体中，然后将加工后的钛粉末固结成挤压的Ti-O-H材料。详细研究了添加剂 ULE 对钛锻造材料的微观结构和强化行为的贡献。挤压Ti-0.97O-0.11H试样表现出1158 MPa的极限拉伸强度（UTS）和23.9%的拉伸伸长率的优异组合，优于Ti-6Al-4V合金（UTS：1047 MPa，伸长率：16.6%）。
Ubiquitous light elements (ULEs) like oxygen (O), nitrogen (N), carbon (C) and hydrogen (H) can be the key additive elements to achieve the high specific strength and cost-effectiveness of powder metallurgy (PM) titanium (Ti) materials. They have high potential to be employed as promising useful reinforcements of conventional expensive alloying elements like vanadium (V) and Niobium (Nb). In this study, two ULEs, oxygen and hydrogen, were induced into pure Ti matrix via the PM route, and then the processed Ti powders were consolidated into the extruded Ti–O–H materials. The additive ULEs’ contribution to the microstructures and strengthening behaviour of Ti wrought materials was investigated in detail. The extruded Ti–0.97O–0.11H specimen exhibited an excellent combination of ultimate tensile strength (UTS) of 1158 MPa and tensile elongation of 23.9%, which were superior to those of Ti–6Al–4V alloy (UTS: 1047 MPa, elongation: 16.6%).