基于X射线显微CT的合金钢中夹杂物的定量三维表征

doi:10.3976/j.issn.1002-4026.2023.03.007

山东科学 ›› 2023, Vol. 36 ›› Issue (3): 53-59.doi: 10.3976/j.issn.1002-4026.2023.03.007

基于X射线显微CT的合金钢中夹杂物的定量三维表征

孙飞^a^,^b(), 蒙庚龙^a, 田力男^b, 李秋蒙^a, 李囡^b, 刘珑^a^,^b^,^*()

a.齐鲁工业大学(山东省科学院) 机械工程学院,山东济南 250014
b.齐鲁工业大学(山东省科学院) 山东省分析测试中心山东省材料失效分析与安全评估工程技术研究中心,山东济南 250014

收稿日期:2022-06-27 出版日期:2023-06-20 发布日期:2023-06-07
通信作者: * 刘珑(1987—),男,博士,副研究员。研究方向为核分析技术在材料失效和损伤容限设计中的应用。E-mail:liulong@qlu.edu.cn
作者简介:孙飞(1998—),男,硕士研究生,研究方向为三维成像技术在材料失效和损伤容限设计中的应用。E-mail:sunfei9872@163.com
基金资助:
国家自然科学基金(12075127)

Three-dimensional characterization of inclusions in alloy steel using X-ray micro-CT computer tomo-graphy

SUN Fei^a^,^b(), MENG Genglong^a, TIAN Linan^b, LI Qiumeng^a, LI Nan^b, LIU Long^a^,^b^,^*()

a. School of Mechanical & Automotive Engineering, Jinan 250014, China
b. Engineering Research Center of Failure Analysis and Safety Assessment, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China

Received:2022-06-27 Online:2023-06-20 Published:2023-06-07

摘要/Abstract

摘要：

夹杂物对钢铁的疲劳强度以及疲劳寿命均会产生影响,但是大块试样中的夹杂物情况无法直接用X射线显微计算机断层扫描 (X射线显微CT)进行精确成像。为实现对大块试样中夹杂物的三维特征观察,采用非水溶液电解的方法获取大块试样中的夹杂物,利用扫描电镜对电解后的夹杂物进行观察和分析,将夹杂物聚合成为圆柱形样品,最后采用X射线显微CT对夹杂物进行三维扫描,得到了大块试样中夹杂物的三维信息,并对夹杂物的各项尺寸数据进行统计分析。该研究为获取大块钢铁试样中夹杂物的三维形貌提供了新思路。

关键词: 夹杂物, 显微计算机断层扫描, 扫描电镜, 非水溶液电解

Abstract:

Inclusions have an impact on the fatigue strength and fatigue life of steel, but inclusions in large samples cannot be accurately imaged using X-ray micro computer tomo-graphy(X-ray micro-CT). This study provides a novel approach to obtain the three-dimensional morphology of inclusions in large steel samples. To realize the three-dimensional features of inclusions in large alloy samples, this study used a nonaqueous electrolysis method to obtain inclusions; then scanning electron microscopy was performed to observe and analyze the electrolyzed inclusions.Furthermore, the electrolyzed inclusions were aggregated into cylindrical samples and finally scanned with X-ray micro-CT to obtain their three-dimensional information, and the obtained dimensional data of the inclusions were statistically analyzed.

Key words: inclusions, micro computer tomo-graphy, scanning electron microscopy, nonaqueous electrolysis

中图分类号:

TG142.1

孙飞, 蒙庚龙, 田力男, 李秋蒙, 李囡, 刘珑. 基于X射线显微CT的合金钢中夹杂物的定量三维表征[J]. 山东科学, 2023, 36(3): 53-59.

SUN Fei, MENG Genglong, TIAN Linan, LI Qiumeng, LI Nan, LIU Long. Three-dimensional characterization of inclusions in alloy steel using X-ray micro-CT computer tomo-graphy[J]. Shandong Science, 2023, 36(3): 53-59.

图/表 9

表1

图1

图2

图3

图4

表2

描述夹杂物三维尺寸和结构的参数"

类型	参数	定义
大小	$d 1$	最小3D费雷特直径
	$d 2$	最大3D费雷特直径
	$d a v e$	平均直径
	$V$	粒子体积
	S	粒子表面积
结构	$D f, a v e$	平均分形维数 $D f, a v e = l o g d a v e 6 V / π$
	$D f, m a x$	最大分形维数 $D f, m a x = l o g d 1 6 V / π$
	$φ$	形状因子 $φ = S 3 36 π V 2$
	$D e q$	等效直径 $D e q = 6 V / π 3$

表2

图5

图6

图7

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基于X射线显微CT的合金钢中夹杂物的定量三维表征

Three-dimensional characterization of inclusions in alloy steel using X-ray micro-CT computer tomo-graphy

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