This article focuses on a systematic study of a Ti-6Al-4V alloy in order to extensively characterize the main mechanical properties at the macro-, micro- and submicrometric length scale under different stress fields. Hardness, elastic modulus, true stress–strain curves and strain-hardening exponent are correlated with the intrinsic properties of the α- and β-phases that constitute this alloy. A systematic characterization process followed, considering the anisotropic effect on both orthogonal crystallographic directions, as well as determining the intrinsic properties for the α-phase. An analytical relationship was established between the flow stress determined under different stress fields, testing geometries and length scales, highlighting that it is possible to estimate flow stress under compression and/or tensile loading from the composite hardness value obtained by instrumented nanoindentation testing.

中文翻译：

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Ti-6Al-4V合金在不同长度尺度下力学性能的实验相关性

本文着重于对Ti-6Al-4V合金的系统研究，以广泛表征在不同应力场下的宏观，微观和亚微米长度尺度上的主要力学性能。硬度，弹性模量，真实应力-应变曲线和应变硬化指数与构成该合金的α-和β-相的固有特性相关。随后的系统表征过程是，考虑到两个正交晶体学方向上的各向异性效应，以及确定α的固有性质-相。在不同应力场下确定的流动应力，测试几何形状和长度尺度之间建立了分析关系，突出表明可以通过仪器化的纳米压痕测试获得的复合硬度值估算压缩和/或拉伸载荷下的流动应力。