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首页> 外文期刊>Journal of Materials Science >STATISTICAL ANALYSIS OF POROSITY IN AL-9 WT-PERCENT SI-3 WT-PERCENT CU-X ALLOY SYSTEMS
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STATISTICAL ANALYSIS OF POROSITY IN AL-9 WT-PERCENT SI-3 WT-PERCENT CU-X ALLOY SYSTEMS

机译：AL-9百分百SI-3百分百CU-X合金系统中孔隙度的统计分析

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A set of 72 solidification experiments was carried out on Al-9 wt % Si-3 wt % Cu-X alloys, varying the additives (namely, strontium, grain refiner and other alloying elements), hydrogen level and thermal parameters in order to obtain a statistical analysis of the resulting porosity in such alloy systems. For all the cases studied, it was found that in each case, the smaller sized pores (in terms of pore length or pore area)could be described by an exponential function, while the larger sized pores were distributed in an irregular fashion, ''small'' and ''large'' being distinguished by that limiting value of pore length or area at which the average value equalled the standard deviation. Two different approaches i.e. factorial and regression methods were utilized to quantify the importance of the parameters controlling the pore size and porosity volume fraction. Two main observations were made: (i) hydrogen is the strongest parameter enhancing porosity formation, with the hydrogen-grain refiner, strontium, strontium-titanium and solidus velocity-solidification time interactions being the other parameters that contribute significantly to porosity formation and increase in pore size; (ii) the grain refiner, hydrogen-phosphorus, strontium-magnesium and iron-phosphorus interaction parameters reduce the porosity, though in different magnitudes. The reliability of predicting the observed effects by the two methods has been discussed. [References: 28]
机译：在Al-9 wt％Si-3 wt％Cu-X合金上进行了72次凝固实验，改变了添加剂（即锶，晶粒细化剂和其他合金元素），氢含量和热参数，以获得对此类合金系统中孔隙率的统计分析。在所有研究的案例中，发现在每种情况下，较小的孔隙（就孔隙长度或孔隙面积而言）可以用指数函数描述，而较大的孔隙以不规则的方式分布，'' “小”和“大”的区别在于孔径或面积的极限值，平均值等于标准偏差。两种不同的方法，即阶乘和回归方法被用来量化控制孔径和孔隙率的参数的重要性。进行了两个主要观察：（i）氢是增强孔隙度的最强参数，而氢晶粒细化剂，锶，锶-钛和固相线速度-凝固时间的相互作用是显着影响孔隙度形成和增加的其他参数。毛孔大小; （ii）晶粒细化剂，氢-磷，锶-镁和铁-磷的相互作用参数降低了孔隙率，尽管幅度不同。讨论了通过两种方法预测观察到的效果的可靠性。 [参考：28]

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