Spinodal decomposition in Fe-9. 0Al-30. 5Mn-xC alloys

Journal Article · Wed Sep 01 04:00:00 EDT 1993 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(93)90412-L· OSTI ID:6273952

Chao, C Y; Hwang, L K; Liu, T F ^[1]

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1. National Chiao Tung Univ. Hsinchu (Taiwan, Province of China)

The microstructures of as-rapidly solidified (RS) Fe-8.8Al-31.5Mn-xC alloys have been studied chiefly by K.H. Han and W.K. Choo. Based on their studies, it is found that in the as-RS condition, the microstructure of the Fe-8.8Al-31.5Mn-xC alloy with 0.74 [<=] x [<=] 1.62 wt pct was a single austenite phase. When the carbon content was increased to 2.02 wt pct or above, fine (Fe, Mn)[sub 3]AlC[sub x] carbides having an L[prime]1[sub 2]-type structure could be formed within the austenite matrix during the rapid solidification process. This means that the carbon content may play an important role in the formation of fine (Fe, Mn)[sub 3]AlC[sub x] carbides in the as-RS Fe-Al-Mn-C alloys. In contrast to the as-RS alloys as mentioned above, the as-quenched microstructure of the Fe-Al-Mn-C alloys, prepared by conventional casting, have also been examined by many workers. In these studies, it is seen that when an alloy with a chemical composition in the range of Fe-(8-11)Al-(28-35)Mn-(0.8-1.3)C was solution heat-treated and then quenched, the microstructure was a single austenite phase. This similar to that observed by K.H. Han and W.K. Choo in the as-RS Fe-Al-Mn-C alloys with lower carbon content. However, to date, information concerning the as-quenched microstructure of the Fe-Al-Mn-C alloy with higher carbon content is very deficient. Therefore, the main purpose of this work is to study the as-quenched microstructure of the Fe-Al-Mn-C alloy with higher carbon content.

• OSTI ID: 6273952
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 29:5; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals &amp; Alloys-- Structure &amp; Phase Studies
ALLOY SYSTEMS
ALLOYS
ALUMINIUM ALLOYS
CARBIDES
CARBON ADDITIONS
CARBON COMPOUNDS
DATA
EXPERIMENTAL DATA
HEAT TREATMENTS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
MICROSTRUCTURE
NUMERICAL DATA