Phase Transformations in an Fe-9Al-30Mn-2.5Cr-0.6C Alloy
碩士 === 國立交通大學 === 材料科學與工程系所 === 95 === Phase transformations in an Fe-9Al-30Mn-2.5Cr-0.6C alloy have been examined by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectrometry (EDS). In the as-quenched condition, the microstruct...
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ndltd-TW-095NCTU51590522016-05-04T04:16:29Z http://ndltd.ncl.edu.tw/handle/74432007636759582730 Phase Transformations in an Fe-9Al-30Mn-2.5Cr-0.6C Alloy 鐵-9鋁-30錳-2.5鉻-0.6碳合金之相變化 Shin-Liang Chen 陳信良 碩士 國立交通大學 材料科學與工程系所 95 Phase transformations in an Fe-9Al-30Mn-2.5Cr-0.6C alloy have been examined by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectrometry (EDS). In the as-quenched condition, the microstructure of the alloy was (austenite + ferrite) dual-phases. No precipitate was found within the ferrite phase and austenite phase in the as-quenched specimen, which was confirmed by the electron diffraction method. When the alloy was aged at 650℃, the phase transformation sequence as the aging time increased was found to be [γ + α] → [γ + (α + D03 + M23C6 + M5C2)] → [(γ + κ' carbide) + (α + D03 + β-Mn + M23C6 + M5C2)]. It is noted that, the monoclinic type M5C2 carbide has not been observed by other workers in Fe-Al-Mn alloy systems before. In addition, the coexistence of M5C2 carbide, D03 and β-Mn has also never been reported in the previous literatures. These results are quite different from the previously observations in the Fe-8.8Al-30Mn-6Cr-1.0C alloy and Fe-9.1Al-29.9Mn -2.9Cr alloy. Tzeng-Feng Liu Chuen-Guang Chao 劉增豐 朝春光 2007 學位論文 ; thesis 51 en_US |
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碩士 === 國立交通大學 === 材料科學與工程系所 === 95 === Phase transformations in an Fe-9Al-30Mn-2.5Cr-0.6C alloy have been examined by means of scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectrometry (EDS).
In the as-quenched condition, the microstructure of the alloy was (austenite + ferrite) dual-phases. No precipitate was found within the ferrite phase and austenite phase in the as-quenched specimen, which was confirmed by the electron diffraction method. When the alloy was aged at 650℃, the phase transformation sequence as the aging time increased was found to be [γ + α] → [γ + (α + D03 + M23C6 + M5C2)] → [(γ + κ' carbide) + (α + D03 + β-Mn + M23C6 + M5C2)]. It is noted that, the monoclinic type M5C2 carbide has not been observed by other workers in Fe-Al-Mn alloy systems before. In addition, the coexistence of M5C2 carbide, D03 and β-Mn has also never been reported in the previous literatures. These results are quite different from the previously observations in the Fe-8.8Al-30Mn-6Cr-1.0C alloy and Fe-9.1Al-29.9Mn
-2.9Cr alloy.
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author2 |
Tzeng-Feng Liu |
author_facet |
Tzeng-Feng Liu Shin-Liang Chen 陳信良 |
author |
Shin-Liang Chen 陳信良 |
spellingShingle |
Shin-Liang Chen 陳信良 Phase Transformations in an Fe-9Al-30Mn-2.5Cr-0.6C Alloy |
author_sort |
Shin-Liang Chen |
title |
Phase Transformations in an Fe-9Al-30Mn-2.5Cr-0.6C Alloy |
title_short |
Phase Transformations in an Fe-9Al-30Mn-2.5Cr-0.6C Alloy |
title_full |
Phase Transformations in an Fe-9Al-30Mn-2.5Cr-0.6C Alloy |
title_fullStr |
Phase Transformations in an Fe-9Al-30Mn-2.5Cr-0.6C Alloy |
title_full_unstemmed |
Phase Transformations in an Fe-9Al-30Mn-2.5Cr-0.6C Alloy |
title_sort |
phase transformations in an fe-9al-30mn-2.5cr-0.6c alloy |
publishDate |
2007 |
url |
http://ndltd.ncl.edu.tw/handle/74432007636759582730 |
work_keys_str_mv |
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