Effect of Ti-Al-O inclusions on the formation of intragranular acicular ferrite
Effect of Ti-Al-O inclusions on the formation of intragranular acicular ferrite
复制标题
Ti-Al-O夹杂物对晶内针状铁素体形成的影响
DOI：
10.3139/120.110760
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发表时间：
2015-07
期刊：
影响因子：
--
通讯作者：
Kong Hui
中科院分区：
文献类型：
--
作者：
Cai Zhengyu;Zhou Yahui;Tong Lianhai;Yue Qiang;Kong Hui
摘要 采用扫描电子显微镜(SEM)和能谱仪(EDS)研究了Ti-Al-O夹杂物对晶内针状铁素体(IAF)形核的作用。从SEM-EDS图可以观察到两种含钛氧化物。 I型为Ti-Al-O相，其中Al和Ti元素共存。 II 型是含钛氧化物，沉淀在 Al2O3 上。通过统计分析可以看出，I型在数量上占主导地位，其Ti/Al摩尔比变化范围较大，反映了其成分的复杂性。蚀刻后，观察IAF的微观结构。可以看出，硫在形核Ti-Al-O夹杂物的外围富集，这归因于MnS的析出。此外，这种积累伴随着Al/Ti含量比的增加，这可以用钛空位来解释。这些空位可以从夹杂物周围的钢基体中吸收锰离子，从而形成锰贫化区（MDZ）。它的存在通过EDS线扫描得到证实，并被认为促进了IAF的形成，因为Mn是一种奥氏体稳定剂。
Abstract The role of Ti-Al-O inclusions on nucleation of intragranular acicular ferrite (IAF) was investigated by scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). From SEM-EDS mapping images, two kinds of titanium containing oxides are observed. Type I is a Ti-Al-O phase, in which the elements of Al and Ti coexist. Type II is the titanium containing oxide, which precipitates on Al2O3. By statistical analysis, it can be seen that Type I is dominating in number, and its molar ratio of Ti/Al varied in a wide range, which reflects its composition complexity. After etching, microstructure of IAF is observed. It can be seen that sulfur accumulates on the periphery of nucleation Ti-Al-O inclusion, which is attributed to the precipitation of MnS. Moreover, this accumulation accompanies increasing in content ratio of Al/Ti, which could be explained by titanium vacancies. These vacancies can absorb Mn ions from the steel matrix around inclusions, which leads to a Mn depletion zone (MDZ). Its existence is confirmed by EDS line scanning, and considered to facilitate the formation of IAF since Mn is an austenite stabilizer.
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影响因子：
10.9
作者：
K. Zhu;Zhenguo Yang
通讯作者：
K. Zhu;Zhenguo Yang
DOI：
10.1007/s11663-009-9290-7
发表时间：
2009-09
期刊：
Metallurgical and Materials Transactions B
影响因子：
--
作者：
Congmin Wang;N. T. Nuhfer;S. Sridhar
通讯作者：
Congmin Wang;N. T. Nuhfer;S. Sridhar
DOI：
10.1007/s11663-009-9267-6
发表时间：
2009-07
期刊：
Metallurgical and Materials Transactions B
影响因子：
--
作者：
Congmin Wang;N. T. Nuhfer;S. Sridhar
通讯作者：
Congmin Wang;N. T. Nuhfer;S. Sridhar
影响因子：
9.4
作者：
Shim, JH;Cho, YW;Lee, DN
通讯作者：
Lee, DN
影响因子：
9.4
作者：
Byun, JS;Shim, JH;Lee, DN
通讯作者：
Lee, DN