Fabrication of Ultrafine-Grained Ti66Nb18Cu6.4Ni6.1Al3.5 Composites with High Strength and Distinct Plasticity by Spark Plasma Sintering and Crystallization of Amorphous Phase
Fabrication of Ultrafine-Grained Ti66Nb18Cu6.4Ni6.1Al3.5 Composites with High Strength and Distinct Plasticity by Spark Plasma Sintering and Crystallization of Amorphous Phase
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DOI：
10.2320/matertrans.md201110
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发表时间：
2012-03
影响因子：
1.2
通讯作者：
Weiping Chen;X. Wu;Chao Yang;Xiaoqiang Li;Mindan Chen;Yuanyuan Li
中科院分区：
文献类型：
--
作者：
Weiping Chen;X. Wu;Chao Yang;Xiaoqiang Li;Mindan Chen;Yuanyuan Li
采用放电等离子烧结和非晶相晶化技术制备了高Nb/Ti比的Ti 66 Nb 18 Cu 6. 4 Ni 6. 1 Al 3. 5合金的韧性超细晶复合材料。显微组织观察表明，所有合金均包含体心立方Ti和面心立方（Cu，Ni）-Ti 2区域，但具有不同的显微组织。合金的断裂强度高达2365 MPa，断裂应变为37.6%。研究结果为用粉末冶金法制备具有良好强度和塑性的两相复合材料提供了一种有前途的方法。[doi：10.2320/matertrans.MD201110]
Ductile ultrafine-grained composites in Ti66Nb18Cu6.4Ni6.1Al3.5 alloy with high Nb/Ti ratio were fabricated by spark plasma sintering and crystallization of amorphous phase. Microstructure observations shows that all alloys encompass body-centered cubic ¢-Ti and face-centered cubic (Cu, Ni)-Ti2 regions but display different microstructures. The alloys exhibit a high fracture strength as high as 2365MPa as well as distinct fracture strain of 37.6%. The results obtained provide a promising method for fabrication of two-phase composites with good combination of strength and ductility by powder metallurgy. [doi:10.2320/matertrans.MD201110]