TY - CHAP
T1 - Alloying and annealing effects on grain boundary character evolution of al-alloy 7075 thin films
T2 - An ACOM-TEM analysis
AU - Parajuli, Prakash
AU - Mendoza-Cruz, Rubén
AU - Yacamán, Miguel José
AU - Ponce, Arturo
N1 - Publisher Copyright:
© The Minerals, Metals & Materials Society 2019.
PY - 2019
Y1 - 2019
N2 - Since polycrystalline materials consist of a complex network of various types of grain boundaries (GBs), a detailed study on the types of the GBs, their distribution and how they are connected is crucial to further enhance the material’s performance. Herein, the GB character distribution (types and connectivity) of as-deposited Al and Al-alloy 7075 thin films, as well as annealed Al-alloy thin films, was investigated using an advanced microscopic technique: ACOM-TEM. Annealing processes up to 12 h caused a decrease in the content ratio of random high-angle GBs (r-HAGBs) and triple junctions comprised of r-HAGBs. However, there was no significant consequence of alloying in the GB type and connectivity distribution. Furthermore, our results indicate that vacuum-deposited Al or Al-alloy thin films possess a strong <111> texture, and a characteristic GB distribution consisting of a significantly high fraction of low coincidence site lattice GBs (predominant ∑1 followed by ∑13b, ∑7, ∑21a, ∑31a and ∑19b in descending order) and a minor fraction of r-HAGBs.
AB - Since polycrystalline materials consist of a complex network of various types of grain boundaries (GBs), a detailed study on the types of the GBs, their distribution and how they are connected is crucial to further enhance the material’s performance. Herein, the GB character distribution (types and connectivity) of as-deposited Al and Al-alloy 7075 thin films, as well as annealed Al-alloy thin films, was investigated using an advanced microscopic technique: ACOM-TEM. Annealing processes up to 12 h caused a decrease in the content ratio of random high-angle GBs (r-HAGBs) and triple junctions comprised of r-HAGBs. However, there was no significant consequence of alloying in the GB type and connectivity distribution. Furthermore, our results indicate that vacuum-deposited Al or Al-alloy thin films possess a strong <111> texture, and a characteristic GB distribution consisting of a significantly high fraction of low coincidence site lattice GBs (predominant ∑1 followed by ∑13b, ∑7, ∑21a, ∑31a and ∑19b in descending order) and a minor fraction of r-HAGBs.
KW - ACOM-TEM
KW - Alloying
KW - Annealing
KW - Grain boundaries
KW - Thin films
KW - Triple junction
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U2 - 10.1007/978-3-030-05749-7_12
DO - 10.1007/978-3-030-05749-7_12
M3 - Chapter
AN - SCOPUS:85064061726
T3 - Minerals, Metals and Materials Series
SP - 109
EP - 119
BT - Minerals, Metals and Materials Series
PB - Springer International Publishing
ER -