TY - JOUR
T1 - Comparative quantification and statistical analysis of η′ and η precipitates in aluminum alloy AA7075-T651 by TEM and AFM
AU - Garcia-Garcia, Adrian Luis
AU - Dominguez-Lopez, Ivan
AU - Lopez-Jimenez, Luis
AU - Barceinas-Sanchez, J. D.Oscar
N1 - Funding Information:
The authors gratefully acknowledge N. Birbilis for providing the TEM images and a piece of aluminum sample for the present study. Financial support for this work was provided by Instituto Politécnico Nacional , through Grant Nos. SIP-20120871 and SIP-20130792 , and Consejo Nacional de Ciencia y Tecnología , for graduate studies (LLJ).
PY - 2014/1
Y1 - 2014/1
N2 - Quantification of nanometric precipitates in metallic alloys has been traditionally performed using transmission electron microscopy, which is nominally a low throughput technique. This work presents a comparative study of quantification of η′ and η precipitates in aluminum alloy AA7075-T651 using transmission electron microscopy (TEM) and non-contact atomic force microscopy (AFM). AFM quantification was compared with 2-D stereological results reported elsewhere. Also, a method was developed, using specialized software, to characterize nanometric size precipitates observed in dark-field TEM micrographs. Statistical analysis of the quantification results from both measurement techniques supports the use of AFM for precipitate characterization. Once the precipitate stoichiometry has been determined by appropriate analytical techniques like TEM, as it is the case for η′ and η in AA7075-T651, the relative ease with which specimens are prepared for AFM analysis could be advantageous in product and process development, and quality control, where a large number of samples are expected for analysis on a regular basis.
AB - Quantification of nanometric precipitates in metallic alloys has been traditionally performed using transmission electron microscopy, which is nominally a low throughput technique. This work presents a comparative study of quantification of η′ and η precipitates in aluminum alloy AA7075-T651 using transmission electron microscopy (TEM) and non-contact atomic force microscopy (AFM). AFM quantification was compared with 2-D stereological results reported elsewhere. Also, a method was developed, using specialized software, to characterize nanometric size precipitates observed in dark-field TEM micrographs. Statistical analysis of the quantification results from both measurement techniques supports the use of AFM for precipitate characterization. Once the precipitate stoichiometry has been determined by appropriate analytical techniques like TEM, as it is the case for η′ and η in AA7075-T651, the relative ease with which specimens are prepared for AFM analysis could be advantageous in product and process development, and quality control, where a large number of samples are expected for analysis on a regular basis.
KW - AA7075-T651
KW - AFM
KW - Aluminum alloys
KW - Precipitates
KW - TEM
UR - http://www.scopus.com/inward/record.url?scp=84890255091&partnerID=8YFLogxK
U2 - 10.1016/j.matchar.2013.11.007
DO - 10.1016/j.matchar.2013.11.007
M3 - Artículo
SN - 1044-5803
VL - 87
SP - 116
EP - 124
JO - Materials Characterization
JF - Materials Characterization
ER -