The dynamic evolution of microstructure and the characteristics of deformation , as well as the relationshipbetween them have ben studied for TCll alloy with different original conditions, including as-cast, as-rolled...The dynamic evolution of microstructure and the characteristics of deformation , as well as the relationshipbetween them have ben studied for TCll alloy with different original conditions, including as-cast, as-rolled ,as-forged and as-predeformed on casting, during comparison at constant temperature (CCT). The resultsshow that (1) Micrcotructural process during CCT of cast TCll comprises two stages: (i) Founding ofu dynamic equilibrium ”. Original coarse structure breaks up and becomes equiaxed, while the stras decreasesaccordingly. The microstructure gradually trends towards some kind of “dynamic ellullibrium” morphology;(ii) Keeping of “dynamic equilibrium”. Both stress and micrcostructural morphology preserve stable althoughdeformation continues. (2) The final pouilibrium morphology das not depend on its initial microstructure, buton the parameter Z(T, e) .展开更多
描述了中国云南秋海棠科Begoniaceae秋海棠属Begonia扁果组sect. Platycentrum的一新种——假侧膜秋海棠Begonia coelocentroides Y. M. Shui & Z. D. Wei。该种与山地秋海棠B. oreodoxa Chun & F. Chun相似, 子房上部为侧膜胎...描述了中国云南秋海棠科Begoniaceae秋海棠属Begonia扁果组sect. Platycentrum的一新种——假侧膜秋海棠Begonia coelocentroides Y. M. Shui & Z. D. Wei。该种与山地秋海棠B. oreodoxa Chun & F. Chun相似, 子房上部为侧膜胎座, 但雌花被片5, 蒴果最大翅舌形, 长20–22 mm, 而易于区别。展开更多
文摘The dynamic evolution of microstructure and the characteristics of deformation , as well as the relationshipbetween them have ben studied for TCll alloy with different original conditions, including as-cast, as-rolled ,as-forged and as-predeformed on casting, during comparison at constant temperature (CCT). The resultsshow that (1) Micrcotructural process during CCT of cast TCll comprises two stages: (i) Founding ofu dynamic equilibrium ”. Original coarse structure breaks up and becomes equiaxed, while the stras decreasesaccordingly. The microstructure gradually trends towards some kind of “dynamic ellullibrium” morphology;(ii) Keeping of “dynamic equilibrium”. Both stress and micrcostructural morphology preserve stable althoughdeformation continues. (2) The final pouilibrium morphology das not depend on its initial microstructure, buton the parameter Z(T, e) .
基金Supported by the National Natural Science Foundation of China, Grant No. 30270109, and the Natural Science Foundation of Yunnan Province, Grant No. 2002C0022Q.
文摘描述了中国云南秋海棠科Begoniaceae秋海棠属Begonia扁果组sect. Platycentrum的一新种——假侧膜秋海棠Begonia coelocentroides Y. M. Shui & Z. D. Wei。该种与山地秋海棠B. oreodoxa Chun & F. Chun相似, 子房上部为侧膜胎座, 但雌花被片5, 蒴果最大翅舌形, 长20–22 mm, 而易于区别。
