期刊
PHILOSOPHICAL MAGAZINE
卷 95, 期 20, 页码 2153-2166出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786435.2015.1051157
关键词
high-speed deformation; titanium; transmission electron microscopy (TEM); twinning; electron backscattered diffraction (EBSD)
类别
资金
- Engineering and Physical Sciences Research Council [EP/H022309/1]
- Engineering and Physical Sciences Research Council [1232883] Funding Source: researchfish
Definitive evidence from both electron backscattered diffraction and transmission electron microscopy is shown for the existence of {1 1 (2)over-bar 4} twinning as a rare deformation twinning mode in coarse-grained commercial purity titanium after room temperature ballistic impact testing at 10(3)s(-1). Non-Schmid-based twin-type selection is demonstrated for {1 1 (2)over-bar 4} and the conjugate {1 1 (2)over-bar 2} deformation twinning modes in this material within grains where the c-axis is closely aligned to the loading direction. Limited Schmid-based twin variant selection is shown for {1 1 (2)over-bar 4} and {1 1 (2)over-bar 2} deformation twinning modes in this material. The occurrence of high area fractions of {1 1 (2)over-bar 4} twinning has relevance for high strain rate plasticity modelling of grains of textured titanium, compressed parallel to their c-axes.
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