PMID- 35384135
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220620
IS  - 1097-0029 (Electronic)
IS  - 1059-910X (Linking)
VI  - 85
IP  - 7
DP  - 2022 Jul
TI  - An advantageous imaging perspective for quantitative evaluation of 7075 aluminum 
      alloy grain boundary precipitates using scanning electron microscope.
PG  - 2618-2627
LID - 10.1002/jemt.24117 [doi]
AB  - 7075 Aluminum alloy (AA7075) samples undergone four aging sequences were examined 
      using a scanning electron microscope (SEM) and a transmitted electron microscope 
      (TEM). The measurements results validate the correlation between stress corrosion 
      cracking (SCC) resistance and the size and inter-distance of the grain boundary 
      precipitates (GBPs). To evaluate the size and inter-distance of GBPs, we 
      demonstrate in this study a highly efficient SEM imaging technique that can 
      unfold grain boundary in a two-dimensional view. Compared to TEM, imaging with 
      backscattered electrons in SEM (SEM-BSE) is more advantageous for GBPs 
      presentation and measurements. The major reason is that about 900 times more 
      sampling area can be imaged with SEM from the same specimen for TEM observation, 
      thus enabling frequent appearances of GBPs at normal top view perspective, a 
      planar view best for GBPs quantitative analysis but not well-documented. The 
      acceleration tension of SEM for imaging was optimized at 10 kV with an 
      information depth of around 330 nm. RESEARCH HIGHLIGHTS: Scanning electron 
      microscope (SEM) imaging using backscattered electrons is efficient for AA7075 
      grain boundary precipitate imaging. The precipitate size and inter-distance can 
      be more accurately measured with the perspective of normal top view under SEM 
      than transmitted electron microscope.
CI  - (c) 2022 National Research Council Canada. Microscopy Research and Technique (c) 2022 
      Wiley Periodicals LLC. Reproduced with the permission of the Minister of 
      Innovation, Science and Industry.
FAU - Li, Dong
AU  - Li D
AD  - National Research Council of Canada - Aluminum Technology Centre, Saguenay, 
      Quebec, Canada.
FAU - Tu, Siyu
AU  - Tu S
AUID- ORCID: 0000-0001-6016-4646
AD  - National Research Council of Canada - Aluminum Technology Centre, Saguenay, 
      Quebec, Canada.
FAU - Chen, Jian
AU  - Chen J
AD  - National Research Council of Canada - Nanotechnology Research Center, Edmonton, 
      Canada.
FAU - Gagne, Marc-Olivier
AU  - Gagne MO
AD  - National Research Council of Canada - Aluminum Technology Centre, Saguenay, 
      Quebec, Canada.
LA  - eng
GR  - National Research Council of Canada/
PT  - Journal Article
DEP - 20220405
PL  - United States
TA  - Microsc Res Tech
JT  - Microscopy research and technique
JID - 9203012
SB  - IM
OTO - NOTNLM
OT  - backscattered electron
OT  - microstructure analysis
OT  - stress corrosion cracking
EDAT- 2022/04/07 06:00
MHDA- 2022/04/07 06:01
CRDT- 2022/04/06 09:14
PHST- 2022/02/11 00:00 [revised]
PHST- 2021/11/24 00:00 [received]
PHST- 2022/03/25 00:00 [accepted]
PHST- 2022/04/07 06:00 [pubmed]
PHST- 2022/04/07 06:01 [medline]
PHST- 2022/04/06 09:14 [entrez]
AID - 10.1002/jemt.24117 [doi]
PST - ppublish
SO  - Microsc Res Tech. 2022 Jul;85(7):2618-2627. doi: 10.1002/jemt.24117. Epub 2022 
      Apr 5.