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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Mechanical characterization and deformation behavior of beta-stabilized Ti-Nb-Sn-Cr alloys
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Mechanical characterization and deformation behavior of beta-stabilized Ti-Nb-Sn-Cr alloys

机译：β稳定的Ti-Nb-Sn-Cr合金的机械表征及变形性能

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摘要

A serial of Ti-25 wt% Nb-(1, 3, 5) wt% Sn-(2, 4) wt% Cr alloys were designed with aim to obtain a single b phase matrix in the microstructure for high performance. The newly designed alloys were produced through cold crucible levitation melting to characterize the effect of Cr and Sn on the microstructure, phase constitution and mechanical properties of the titanium alloys. All the investigated alloys display a monolithic beta phase microstructure and exhibit high maximum strength (similar to 5 GPa) as well as superior plasticity (similar to 80%, without failure even though the maximum load limit is reached at the load capacity of 100 kN). Deformation mechanism is anticipated on the basis of twins and slip band patterns obtained in the vicinity of micro-hardness indentation, (Bo) over bar-(Md) over bar phase stability map and (e/a) over bar-(Delta r) over barr diagram. Moreover, shear band analyses on deformed samples are also conducted. Additionally, the evaluation of wear resistance indices (H/E and H-3/E-eff(2)) are employed in the present work. Amongst all the investigated alloys, Ti-25Nb-1Sn-2Cr shows the lowest Young's modulus (66 GPa) with the highest values of yield strength, hardness and wear resistance indices. (C) 2019 Elsevier B.V. All rights reserved.
机译：设计了连续的Ti-25wt％Nb-（1,3,5）Wt％sn-（2,4）wt％Cr合金，目的是在微观结构中获得单一B相基质以进行高性能。通过冷坩埚悬浮熔化产生新设计的合金，以表征Cr和Sn对钛合金微观结构，相体积和力学性能的影响。所有研究的合金显示一整体β相显微组织，表现出高的最大强度（类似于5GPa）以及卓越的可塑性（类似于80％，即使在100kn的负载容量达到最大负载限制） 。基于在细胞相位稳定图（MD）上的微硬度缩进，（Bo）附近获得的双胞胎和滑带图案，通过酒吧 - 相位稳定性图和（e / a）在Bar-（delta r）的基础上，预期变形机制过度律师图。此外，还进行了变形样品上的剪切带分析。另外，在本作中使用耐磨性指数（H / E和H-3 / E-EFF（2））的评估。在所有调查的合金中，TI-25NB-1SN-2CR显示最低的杨氏模量（66GPa），屈服强度，硬度和耐磨指数的最高值。 （c）2019 Elsevier B.v.保留所有权利。

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