Mechanical behavior of ultrafine-grained/nanocrystalline titanium synthesized by mechanical milling plus consolidation: Experiments, modeling and simulation

被引：55

作者：

Liu, Jian ^{[1
]}

Khan, Akhtar S. ^{[1
]}

Takacs, Laszlo ^{[2
]}

Meredith, Christopher S. ^{[1
]}

机构：

[1] Univ Maryland Baltimore Cty, Dept Mech Engn, Baltimore, MD 21250 USA

[2] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA

来源：

INTERNATIONAL JOURNAL OF PLASTICITY | 2015年 / 64卷

关键词：

Powder compaction; Strengthening mechanisms; Constitutive behaviour; Kolsky bar; SEVERE PLASTIC-DEFORMATION; NANOCRYSTALLINE TITANIUM; PURE TITANIUM; STRAIN RATES; HYDROSTATIC EXTRUSION; GRAINED TITANIUM; WIDE-RANGE; TI RODS; MICROSTRUCTURE; SPD;

D O I：

10.1016/j.ijplas.2014.08.007

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

High quality bulk ultrafine-grained/nanocrystalline titanium samples were prepared through room temperature mechanical milling and conventional consolidation processes. The prepared bulk samples showed high purity, very low porosity and high ductility under compression. The dependency of yield stress and post-yielding behavior on grain size, strain rate and temperature were comprehensively studied. The texture evolution of the ufg/nc samples under compression was measured by synchrotron XRD. On the macroscopic scale, the viscoplastic phenomenological Khan-Liang-Farrokh (KLF) model was used to correlate the experimental results of the ufg/nc Ti. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：151 / 163

页数：13

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