占有率（結晶粒）

US10113223(NIPPON STEEL & SUMITOMO METAL CORP [JP])
[0255] Further, a thickness cross section parallel to the rolling direction of the steel sheet was set as an observed section and a sample was collected from the hot-dip galvanized steel sheet.
【０１３１】
  さらに、溶融亜鉛めっき鋼板から鋼板の圧延方向に平行な板厚断面を観察面として試料を採取し、

The observed section of the sample was observed with a field emission scanning electron microscope (FE-SEM) to observe the interface between the plated layer and the base steel sheet,
電界放射型走査型電子顕微鏡（ＦＥ－ＳＥＭ）による観察を行い、めっき層と母材鋼板の界面を観察し、

and the ratio of the interface between the ζ phase and the base steel sheet in the interface between the plated layer and the base steel sheet (boundary surface occupancy ratio)
ζ相と母材鋼板の界面がめっき層と母材鋼板の界面全体に占める割合（境界面占有率）、

and the ratio of the interface between the δ1 phase and the base steel sheet in the entire interface between the plated layer and the base steel sheet (boundary surface occupancy ratio) were measured.
ならびにδ１相と母材鋼板の界面がめっき層と母材鋼板の界面全体に占める割合（境界面占有率）を測定した。

US11060156(NIPPON STEEL & SUMITOMO METAL CORP [JP]; NIPPON STEEL CORP [JP])

[0062] The coverage of grain boundaries with M23 C6 -type carbides was determined by the length occupancy of precipitates on large-angle grain boundaries based on a SEM observation image with a magnifying power of 10,000 and a TEM observation image of thin film.
【００４１】
  なお、Ｍ_２３Ｃ_６型炭化物による粒界被覆率は、倍率１万倍のＳＥＭ観察像と薄膜のＴＥＭ観察像によって、大角粒界上の析出物の長さ占有率によって決定した。

The nature of grain boundaries (difference in angle between the direction of adjacent crystals and the normal direction) was measured by an electron-beam backscatter analysis device (EBSD) and a grain boundary with an angle relative to an adjacent crystal grain of 15° or larger was determined to be a “large-angle grain boundary”.
また、粒界の性格（隣接結晶方位との法線方位の角度差）は電子線後方散乱解析装置（ＥＢＳＤ）により測定し、隣接結晶粒とのなす角が１５°以上の場合に「大角粒界」であると判断した。

Large-angle grain boundary as used herein means “prior γ grain boundary”, “packet grain boundary” or “a major portion of a block grain boundary”, which are crystallographic names of martensite or bainite, and is a crystal grain boundary that is effective as precipitation nuclei for precipitates.
ここで大角粒界とはマルテンサイト又はベイナイトの結晶学的呼称である「旧γ粒界」、「パケット粒界」、あるいは「ブロック粒界の大部分」を意味し、析出物の析出核として有効な結晶粒界である。

For the occupancy of precipitates on such large-angle grain boundaries, measured values were used assuming that the result of a two-dimensional observation is generally equal to the area occupancy on the three-dimensional surface of a grain boundary (border).
この大角粒界上の析出物の占有率は、２次元観察結果が、３次元の粒界（境界）面上の面積占有率にほぼ等しいと仮定し、測定値をそのまま使用した。

These values may be converted to three-dimensional values using a simple equation determined by calculation analysis; however, the inventors decided that it would not be necessary to calculate scientifically precise values, and pursued convenience by using observation results as they were obtained.
この値は計算解析によって求まる簡易な式で３次元の値に変換できるが、学術的に正確な値を求める必要はないと判断し、観察結果をそのまま使用することによる利便性を優先した。