Figure 8.
Roughness values Ra (µm) after aging: median, interquartile range (IQR, 75th percentile (Q1), 25th percentile (Q3)), upper whisker (Q1–1.5 IQR), lower whisker (Q3–1.5 IQR).
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.