Synthesis and Mechanical Characterisation of an Ultra-Fine Grained Ti-Mg Composite
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In: Materials, Vol. 9.2016, No. 8, 688, 11.08.2016.
Research output: Contribution to journal › Article › Research › peer-review
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TY - JOUR
T1 - Synthesis and Mechanical Characterisation of an Ultra-Fine Grained Ti-Mg Composite
AU - Alfreider, Markus
AU - Jeong, Jiwon
AU - Esterl, Raphael
AU - Oh, Sang Ho
AU - Kiener, Daniel
PY - 2016/8/11
Y1 - 2016/8/11
N2 - The importance of lightweight materials such as titanium and magnesium in various technical applications, for example aerospace, medical implants and lightweight construction is well appreciated. The present study is an attempt to combine and improve the mechanical properties of these two materials by forming an ultra-fine grained composite. The material, with a composition of 75 vol% (88.4 wt%) Ti and 25 vol% (11.4 wt%) Mg , was synthesized by powder compression and subsequently deformed by high-pressure torsion. Using focused ion beam machining, miniaturised compression samples were prepared and tested in-situ in a scanning electron microscope to gain insights into local deformation behaviour and mechanical properties of the nanocomposite. Results show outstanding yield strength of around 1250 MPa, which is roughly 200 to 500 MPa higher than literature reports of similar materials. The failure mode of the samples is accounted for by cracking along the phase boundaries.
AB - The importance of lightweight materials such as titanium and magnesium in various technical applications, for example aerospace, medical implants and lightweight construction is well appreciated. The present study is an attempt to combine and improve the mechanical properties of these two materials by forming an ultra-fine grained composite. The material, with a composition of 75 vol% (88.4 wt%) Ti and 25 vol% (11.4 wt%) Mg , was synthesized by powder compression and subsequently deformed by high-pressure torsion. Using focused ion beam machining, miniaturised compression samples were prepared and tested in-situ in a scanning electron microscope to gain insights into local deformation behaviour and mechanical properties of the nanocomposite. Results show outstanding yield strength of around 1250 MPa, which is roughly 200 to 500 MPa higher than literature reports of similar materials. The failure mode of the samples is accounted for by cracking along the phase boundaries.
KW - Composite materials
KW - High-pressure torsion (HPT)
KW - In-situ
KW - Magnesium
KW - Microcompression
KW - Scanning electron microscopy (SEM)
KW - Titanium
UR - http://www.scopus.com/inward/record.url?scp=84984629309&partnerID=8YFLogxK
U2 - 10.3390/ma9080688
DO - 10.3390/ma9080688
M3 - Article
AN - SCOPUS:84984629309
VL - 9.2016
JO - Materials
JF - Materials
SN - 1996-1944
IS - 8
M1 - 688
ER -