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@ARTICLE{Maziarz:646666,
author = {Maziarz, Wojciech and Chulist, Robert and Chyzhyk, Ganna
and Wojcik, Anna and Kurtyka, Pawel and Sobula, Sebastian
and Schell, Norbert and Olejnik, Ewa},
title = {{E}ffect of microstructural heterogeneity on the
strengthening and fracture mechanism in in-situ cast
{T}i{C}/{A}l composites},
journal = {Materials and design},
volume = {264},
issn = {0264-1275},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PUBDB-2026-00913},
pages = {115756},
year = {2026},
abstract = {Structural heterogeneity is an inherent feature that occurs
practically in all cast materials. In this work,
wedemonstrated that the chemical heterogeneity resulting
from the SHS reaction of TiC formation in the aluminumAl1000
alloy bath can enhance the strength by refining the matrix
grains in in-situ cast TiC/Al1000 composites.Using advanced
characterization techniques including X-Ray synchrotron
radiation diffraction, (S)TEM-HREMand SEM-EBSD studies, we
identified two types of aluminum solid solutions within the
dendritic grains of theAl1000 matrix, distinguished by
different lattice parameters. These differences result from
the presence ofunreacted titanium, which locally forms a
supersaturated solid solution in the form of
nanoprecipitates with asize of about 10 nm and a smaller
lattice parameter compared to titanium-free regions. Another
structuralheterogeneity influencing the mechanical
properties and fracture of composites is the agglomeration
of TiCparticles driven by the pushing and engulfment of
particles at the crystallization front. Fractographic
analysisrevealed a correlation between mechanical properties
and wear resistance in TiC/Al1000 composites with
TiCcontents ranging from 5 to 15 $vol\%.$ In samples with
more than 10 $vol\%$ TiC, particle agglomeration
contributedto increased strength but reduced ductility, due
to weakened interfacial bonding and non-uniform
deformationunder load.},
cin = {DOOR ; HAS-User / Hereon},
ddc = {690},
cid = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)Hereon-20210428},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3)},
pid = {G:(DE-HGF)POF4-6G3},
experiment = {EXP:(DE-H253)P-P07-20150101},
typ = {PUB:(DE-HGF)16},
doi = {10.1016/j.matdes.2026.115756},
url = {https://bib-pubdb1.desy.de/record/646666},
}