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冷轧铝板微织构演变的原位加热电子背散射衍射分析 被引量:2
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作者 王晓冬 王丽 +2 位作者 翟亚迪 吉元 毛圣成 《电子显微学报》 CAS CSCD 2014年第6期510-515,共6页
采用原位加热电子背散射衍射(EBSD)技术,对冷轧铝板在回复和再结晶转变过程中的微织构演变规律进行了动态研究。轧制态铝板以铜型织构{112}〈111〉为主。再结晶转变后,以立方织构{001}〈100〉和R织构{124}〈211〉为主。在回复和再结晶... 采用原位加热电子背散射衍射(EBSD)技术,对冷轧铝板在回复和再结晶转变过程中的微织构演变规律进行了动态研究。轧制态铝板以铜型织构{112}〈111〉为主。再结晶转变后,以立方织构{001}〈100〉和R织构{124}〈211〉为主。在回复和再结晶过程中,{001}〈100〉晶粒和{124}〈211〉晶粒优先在形变带边缘形成和长大。晶粒长大通过晶界迁移并吞噬周围晶粒而得以发展。本研究对于理解轧制铝板的再结晶过程和机制,并有效控制轧制铝板的织构具有重要的参考价值。 展开更多
关键词 电子背散射衍射 微织构 轧制铝板 再结晶转变
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热加工工艺制度对中低碳钢组织结构的影响规律研究
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作者 邸全康 王全礼 +1 位作者 金永春 康永林 《首钢科技》 2011年第3期1-5,共5页
对0.23%C-O.60%Si-1.50%Mn-0.505Ceq钢的热加工工艺制度对组织结构的影响规律进行了深入研究。为实现此成分体系钢种在P+F组织条件下的低合金成本和高强度的最大化,通过TEM、SEM分析了位错形貌及密度,验证了晶内先共析铁素体... 对0.23%C-O.60%Si-1.50%Mn-0.505Ceq钢的热加工工艺制度对组织结构的影响规律进行了深入研究。为实现此成分体系钢种在P+F组织条件下的低合金成本和高强度的最大化,通过TEM、SEM分析了位错形貌及密度,验证了晶内先共析铁素体的析出条件;通过热膨胀仪测定了形变温度对材料动态CCT的影响,测定并计算出形变温度对材料软化率和动态再结晶率的影响。 展开更多
关键词 冷却连续转变曲线动态再结晶晶内铁素体珠光体片层间距位错密度
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Relation of normal load with test temperature at mild−severe wear transition state for Mg−Gd−Y−Zr alloy 被引量:3
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作者 Yuan-bo WANG Wei ZHAO +1 位作者 Liang LI Jian AN 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2021年第10期2986-2998,共13页
The wear behavior and mild−severe(M−S)wear transition of Mg−10Gd−1.5Y−0.4Zr alloy were investigated within a temperature range of 20−200℃.The morphologies and compositions of worn surfaces were examined to identify t... The wear behavior and mild−severe(M−S)wear transition of Mg−10Gd−1.5Y−0.4Zr alloy were investigated within a temperature range of 20−200℃.The morphologies and compositions of worn surfaces were examined to identify the wear mechanisms using scanning electron microscope and energy dispersive X-ray spectrometer.The microstructure and hardness in the subsurfaces were analyzed to reveal the M−S wear transition mechanism.Under a constant loads of 20,35 and 40 N,each wear rate−test temperature curve presented a turning point which corresponded to the M−S wear transition.In mild wear,the surface material was plastically deformed and hence was strainhardened,whereas in severe wear,the surface material was dynamically recrystallized and consequently was softened.It has been found that the critical temperature for M−S wear transition decreases with increasing the normal load,and the normal load exhibits an almost linear relationship with critical temperature for M−S wear transition.This work reveals that the M−S wear transition of the studied alloy conforms to the surface DRX temperature criterion. 展开更多
关键词 Mg−Gd−Y−Zr alloy elevated-temperature wear microstructure recrystallization mild−severe wear transition
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Influence of free-end torsion on compressive behavior of extruded AZ31 rod at various temperatures
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作者 Fan WU Meng WANG +6 位作者 Zhi-wen DU Ruo-lan SHI Qi SHANG Ting-ting LIU Ning GUO Sheng-feng GUO Bo SONG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第11期3563-3577,共15页
The influence of free-end torsion on compressive behavior of an extruded AZ31 rod at various temperatures was studied.Pre-torsion generates a high density of dislocations and a large number of{1012}twins in the matrix... The influence of free-end torsion on compressive behavior of an extruded AZ31 rod at various temperatures was studied.Pre-torsion generates a high density of dislocations and a large number of{1012}twins in the matrix,which can largely enhance the compressive yield strength at RT and 100℃.However,with increasing temperature,hardening effect via pre-torsion gradually decreases.When the compressive temperature reaches 300℃,pre-torsion reduces the compressive yield strength.Moreover,initial dislocations and twins via torsion help to refine the sub-structure and accelerate the continuous dynamic recrystallization during compression at 200℃.Thus,twisted sample exhibits more rapid flow softening behavior than the as-extruded sample at 200℃.When compressed at 300℃,the twins and dislocations via torsion were largely eliminated during the holding time,and the discontinuous dynamic recrystallization was enhanced.It is found that the compression curves of twisted sample and as-extruded sample tended to be coincident at 300℃.Related mechanisms were discussed in detail. 展开更多
关键词 Mg alloys free-end torsion compressive behavior dynamic recrystallization hot deformation TWINS dislocations
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