金属合金等温相变的体激活能及相变机制 II. β 黄铜等温相变. Overall activation energy of isothermal transformation in metal alloy and its mechanism: II. Isothermal transformation in beta brasses

康沫狂 Kang, Mokuang, 张明星 Zhang, Mingxing, 刘 峰 Liu, Feng and 朱明 Zhu, Ming (2009) 金属合金等温相变的体激活能及相变机制 II. β 黄铜等温相变. Overall activation energy of isothermal transformation in metal alloy and its mechanism: II. Isothermal transformation in beta brasses. 金属学报, 45 1: 32-36.

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Author 康沫狂 Kang, Mokuang
张明星 Zhang, Mingxing
刘 峰 Liu, Feng
朱明 Zhu, Ming
Title 金属合金等温相变的体激活能及相变机制 II. β 黄铜等温相变. Overall activation energy of isothermal transformation in metal alloy and its mechanism: II. Isothermal transformation in beta brasses
Formatted title
金属合金等温相变的体激活能及相变机制 II. β 黄铜等温相变
Overall activation energy of isothermal transformation in metal alloy and its mechanism: II. Isothermal transformation in β brasses
Translated title Overall activation energy of isothermal transformation in metal alloy and its mechanism: II. Isothermal transformation in β brasses
Language of Title chi
eng
Journal name 金属学报   Check publisher's open access policy
Translated journal name Acta Metallurgica Sinica
Language of Journal Name chi
eng
ISSN 0412-1961
Publication date 2009-01-01
Year available 2009
Sub-type Article (original research)
Open Access Status Not yet assessed
Volume 45
Issue 1
Start page 32
End page 36
Total pages 15
Editor K. Hun
Place of publication Beijing, China
Publisher Kexue Chubanshe
Language chi
eng
Subject 8612 Fabricated Metal Products
0912 Materials Engineering
091207 Metals and Alloy Materials
C1
Abstract Similarly to steels, in the isothermally treated β brasses, the plate-like α(bainite) and rod-like α have all themselves C curves. A single phase is always produced in the primary stage, whereas the nearby two-phase complex is usually produced in the medium or final stage of the transformation. Only a single phase and Arrhenius equation must be used to deduce the overall activation energy for the transformation product. By a combination of overall activation energy, morphology and change of free energy, it can be explained that the plate-like α(bainite) transformation mechanism follows military atom diffusionless martensite-like shear, occurring in solute-depleted region controlled by solute atom diffusion in parent phase β′, and the rod-like α phase results from civilian atom diffusionless interphase control transformation, occurring in the most solute-depleted region controlled by solute atom diffusion in parent phase β′.
Formatted abstract
与钢相似, β 黄铜等温处理获得的片状 α1(贝氏体) 和棒状 α 都具有自己的 C 曲线; 各转变初期均能获单一相, 而转变中、后期通常可获相邻两相的复合体. 必须用单一相和 Arrhenius 关系求相变产物的体激活能. 用体激活能、相的形貌和体自由能变化相结合能可诠释下述论点: 片状 α1(贝氏体) 是溶质原子扩散控制下母相 β' 中的贫溶质区, 进行“军队型”原子无扩散马氏体样切变相变; 棒状 α 是溶质原子扩散控制下母相 β' 中的最贫溶质区, 发生“平民型”原子无扩散界面控制相变.

Similarly to steels, in the isothermally treated β brasses, the plate-like α1 (bainite) and rod-like α have all themselves C curves. A single phase is always produced in the primary stage, whereas the nearby two-phase complex is usually produced in the medium or final stage of the transformation. Only a single phase and Arrhenius equation must be used to deduce the overall activation energy for the transformation product. By a combination of overall activation energy, morphology and change of free energy, it can be explained that the plate-like α1 (bainite) transformation mechanism follows military atom diffusionless martensite-like shear, occurring in solute-depleted region controlled by solute atom diffusion in parent phase β', and the rod-like α phase results from civilian atom diffusionless interphase control transformation, occurring in the most solute-depleted region controlled by solute atom diffusion in parent phase β'.
Keyword Plate-like alpha(1) (bainite)
Shape-memory alloys
Plate–like α1 (bainite)
Rod–like α
Overall activation energy
Martensite–like shear
Interphase control transformation
β Brass
Rod–like alpha
beta Brass
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Abstract only in English.

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Mechanical & Mining Engineering Publications
ERA 2012 Admin Only
 
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Created: Thu, 03 Sep 2009, 18:38:13 EST by Mr Andrew Martlew on behalf of Materials