QQ客服 官方微博 反馈留言

	Al-Mg-Si合金搅拌摩擦焊接头DSC测试过程中组织变化及能量释放分析
	戴启雷 ; 梁志芳 ; 吴建军 ; 孟立春 ; 史清宇 ; DAI Qilei ; LIANG Zhifang ; WU Jianjun ; MENG Lichun ; SHI Qingyu
	2016-03-30 ; 2016-03-30
关键词	搅拌摩擦焊(FSW) 电子背散射技术(EBSD) 储存能 Al-Mg-Si合金 差热扫描量热法(DSC) friction stir welding(FSW) electron back scattering diffraction(EBSD) stored energy Al-Mg-Si alloy differential scanning calorimetry(DSC) TG453.9 TG146.21
其他题名	MICROSTRUCTURE CHANGE AND ENERGY RELEASE OF FRICTION STIR WELDED Al-Mg-Si ALLOY DURING DSC TEST
中文摘要	对Al-Mg-Si合金搅拌摩擦焊焊核区组织进行了差热扫描量热分析(DSC),同时运用EBSD和TEM观察了焊核区的微观组织,并对存储能进行了定量分析.研究表明,焊核区为不稳定组织,焊核区组织中小角度晶界占42%,大角度晶界占58%,同时晶粒内部分布有较高密度的位错结构.焊核区含有较高的存储能(8.565 J/g),通过EBSD对焊核区较高存储能进行了定量分析,结果表明,位错存储在晶界和亚晶界的能量为0.0247 J/g,存储在晶粒内部的能量为0.0712 J/g.通过DSC定量分析的能量释放来自于焊核区晶粒内部位错的消失和析出相的析出,其中由析出相析出所造成的能量释放占主导作用,位错存储在晶界和亚晶界的存储能通过DSC加热并未释放.; During friction stir welding, the nugget zone(NZ) underwent severe plastic deformation and high temperature. This process resulted in high density of dislocations and dissolving of the precipitation. In this study, the stored energy of the NZ in friction stir welded Al-Mg-Si joint was quantitatively analyzed by means of differential scanning calorimetry(DSC). The microstructure of the NZ was investigated by electron back scattering diffraction(EBSD) and transmission electron microscope(TEM). DSC analysis showed that the energy stored in the NZ was about 8.565 J/g. Microstructure investigation showed that the NZ was composed of low-angle grain boundary(42%) and high- angle grain boundary(58%). Meanwhile, there were high density dislocations in the NZ. The stored energy was quantitatively analyzed based on EBSD data and dislocation density. The results showed that the stored energy resulting from the grain boundary and dislocations was about 0.0247 J/g and 0.0712 J/g, respectively. These results proved that the precipitation played dominant role in stored energy while the contribution of grain boundary and dislocations are negligible.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/144420]
专题	清华大学
推荐引用方式 GB/T 7714	戴启雷,梁志芳,吴建军,等. Al-Mg-Si合金搅拌摩擦焊接头DSC测试过程中组织变化及能量释放分析[J],2016, 2016.
APA	戴启雷.,梁志芳.,吴建军.,孟立春.,史清宇.,...&SHI Qingyu.(2016).Al-Mg-Si合金搅拌摩擦焊接头DSC测试过程中组织变化及能量释放分析..
MLA	戴启雷,et al."Al-Mg-Si合金搅拌摩擦焊接头DSC测试过程中组织变化及能量释放分析".(2016).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。