The infuence of rare earth(RE)elements on austenite–ferrite phase transformation in Fe–0.14%C alloy has been investigated by in situ observing the nucleation,growth and morphology of ferrite using high temperature l...The infuence of rare earth(RE)elements on austenite–ferrite phase transformation in Fe–0.14%C alloy has been investigated by in situ observing the nucleation,growth and morphology of ferrite using high temperature laser scanning confocal microscopy,and controlled atmosphere decarburization experiments.It is found that under the low-oxygen condition in steel,trace RE addition can signifcantly infuence the nucleation,morphology and growth of ferrite in Fe–0.14%C alloy by the combined efects of RE slowing down the carbon difusion and decreasing grain boundary energy by segregating at grain boundaries.This research provides evidences of adjusting the phase transformation and improving the mechanical properties of steels by RE addition.展开更多
2021年联合国世界信息峰会奖颁奖大会于5月18日线上举行。“中国科协联合国咨商专委会新冠病毒肺炎(COVID-19)数据与知识信息系统”荣获2021年联合国世界信息峰会奖(电子科学组冠军奖)。联合国世界信息峰会(World Summit on the Informa...2021年联合国世界信息峰会奖颁奖大会于5月18日线上举行。“中国科协联合国咨商专委会新冠病毒肺炎(COVID-19)数据与知识信息系统”荣获2021年联合国世界信息峰会奖(电子科学组冠军奖)。联合国世界信息峰会(World Summit on the Information Society,WSIS)于2003、2005年分别在日内瓦和突尼斯举行。该峰会是由联合国经社事务部、国际电信联盟、联合国教科文组织、联合国开发计划署、联合国贸发会议等共同组织的全球多利益相关方交流平台,致力于推进全球信息社会的可持续发展。展开更多
基金supported by the National Natural Science Foundation(No.52031013).
文摘The infuence of rare earth(RE)elements on austenite–ferrite phase transformation in Fe–0.14%C alloy has been investigated by in situ observing the nucleation,growth and morphology of ferrite using high temperature laser scanning confocal microscopy,and controlled atmosphere decarburization experiments.It is found that under the low-oxygen condition in steel,trace RE addition can signifcantly infuence the nucleation,morphology and growth of ferrite in Fe–0.14%C alloy by the combined efects of RE slowing down the carbon difusion and decreasing grain boundary energy by segregating at grain boundaries.This research provides evidences of adjusting the phase transformation and improving the mechanical properties of steels by RE addition.
文摘2021年联合国世界信息峰会奖颁奖大会于5月18日线上举行。“中国科协联合国咨商专委会新冠病毒肺炎(COVID-19)数据与知识信息系统”荣获2021年联合国世界信息峰会奖(电子科学组冠军奖)。联合国世界信息峰会(World Summit on the Information Society,WSIS)于2003、2005年分别在日内瓦和突尼斯举行。该峰会是由联合国经社事务部、国际电信联盟、联合国教科文组织、联合国开发计划署、联合国贸发会议等共同组织的全球多利益相关方交流平台,致力于推进全球信息社会的可持续发展。
