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首页> 外文期刊>Journal of Materials Engineering and Performance >Hot Workability and Processing Maps of 7150 Aluminum Alloys with Zr and V Additions
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Hot Workability and Processing Maps of 7150 Aluminum Alloys with Zr and V Additions

机译：含Zr和V的7150铝合金的热加工性和加工图

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摘要

The hot workability and processing maps of 7150 aluminum alloys with different Zr additions (0-0.15 wt.%) and V additions (0.01-0.15 wt.%) were investigated using uniaxial compression tests conducted at various temperatures (300-450 degrees C) and strain rates (0.001-10 s(-1)). The results reveal that the processing map of the 7150 base alloy exhibits a single domain (Domain I) associated with dynamic recovery and partially dynamic recrystallization. With the increasing Zr and V additions, Domain I shrinks toward higher temperatures and higher strain rates and exhibits decreases in efficiency of power dissipation due to a restrained level of dynamic recovery caused by the pinning effect of Al3Zr and Al21V2 dispersoids. When the added Zr and V contents reach 0.15%, another domain (Domain II) is formed, corresponding to cavity formation in the microstructure. Flow instability during hot deformation of 7150 alloys is attributed to the formation of adiabatic shear bands and deformation bands. The instability region extends toward lower strain rates when alloyed with Zr and V. The optimum hot-working parameters for those alloys are determined to be a deformation temperature of 450 degrees C and a strain rate of 0.01 s(-1).
机译：使用在不同温度（300-450摄氏度）下进行的单轴压缩试验研究了7150种具有不同Zr添加量（0-0.15 wt。％）和V添加量（0.01-0.15 wt。％）的铝合金的热加工性和加工图和应变率（0.001-10 s（-1））。结果表明，7150基合金的加工图表现出与动态恢复和部分动态再结晶相关的单个域（域I）。随着Zr和V添加量的增加，由于Al3Zr和Al21V2弥散体的钉扎效应导致动态恢复水平受到限制，畴I向较高的温度和较高的应变速率收缩，并降低了功耗效率。当添加的Zr和V含量达到0.15％时，会形成另一个域（域II），与微结构中的空腔形成相对应。 7150合金热变形过程中的流动不稳定性归因于绝热剪切带和变形带的形成。当与Zr和V合金化时，不稳定性区域向较低的应变速率延伸。确定这些合金的最佳热加工参数为450摄氏度的变形温度和0.01 s（-1）的应变速率。

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