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Title: Grain neighbour effects on twin transmission in hexagonal close-packed materials

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms13826· OSTI ID:1340967

Materials with a hexagonal close-packed (hcp) crystal structure such as Mg, Ti and Zr are being used in the transportation, aerospace and nuclear industry, respectively. Material strength and formability are critical qualities for shaping these materials into parts and a pervasive deformation mechanism that significantly affects their formability is deformation twinning. The interaction between grain boundaries and twins has an important influence on the deformation behaviour and fracture of hcp metals. Here, statistical analysis of large data sets reveals that whether twins transmit across grain boundaries depends not only on crystallography but also strongly on the anisotropy in crystallographic slip. As a result, we show that increases in crystal plastic anisotropy enhance the probability of twin transmission by comparing the relative ease of twin transmission in hcp materials such as Mg, Zr and Ti.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC). Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1340967
Report Number(s):
LA-UR-16-22936
Journal Information:
Nature Communications, Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 127 works
Citation information provided by
Web of Science

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Cited By (11)

Effect of Grain Misorientation Angle on Twinning Propagation in Ti–15Mo Alloy journal March 2018
Strong grain neighbour effects in polycrystals journal January 2018
Direct observation and impact of co-segregated atoms in magnesium having multiple alloying elements journal July 2019
On the evolving nature of c/a ratio in a hexagonal close-packed epsilon martensite phase in transformative high entropy alloys journal September 2019
Quantitative analysis of {332}〈113〉 twinning in a Ti-15Mo alloy by in situ scanning electron microscopy journal June 2018
Interface structures and twinning mechanisms of twins in hexagonal metals journal June 2017
Modeling the effect of neighboring grains on twin growth in HCP polycrystals journal August 2017
Effect of twin boundary on the initial yield behavior of magnesium nanopillars under compression: molecular dynamics simulations journal February 2018
Deformation twinning and grain partitioning in a hexagonal close-packed magnesium alloy journal November 2018
Characterizing the role of adjoining twins at grain boundaries in hexagonal close packed materials journal March 2019
Computational Homogenization of Polycrystals text January 2018

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