Effectiveness of naphthalene in grain refinement of commercially pure aluminum and zinc ingot castings
It is well established that the properties of cast metals are greatly improved by refinement of their grain size. The method employed in this study for the refinement of grain size of commercially pure aluminum and zinc castings is inoculation of naphthalene in powder form to the mould prior to pour...
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| Published in | Engineering and Technology Journal Vol. 29; no. 8; pp. 1545 - 1553 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Arabic English |
| Published |
Baghdad, Iraq
University of Technology
01.06.2011
Unviversity of Technology- Iraq |
| Subjects | |
| Online Access | Get full text |
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| Abstract | It is well established that the properties of cast metals are greatly improved by refinement of their grain size. The method employed in this study for the refinement of grain size of commercially pure aluminum and zinc castings is inoculation of naphthalene in powder form to the mould prior to pouring the molten metal. The results show that the addition of naphthalene remarkably suppresses the formation of columnar grains and refines the structure. Increasing the amount of naphthalene addition also minimizes and may eliminate the formation of the shrinkage cavity. Furthermore, the ability of castings for mechanical working increases as the naphthalene addition increases.
من المعروف إن خواص المعادن المسبوكة تتحسن كثيرا بتنعيم حبيباتها، و الطريقة المستخدمة في هذه الدراسة لتنعيم حبيبات مسبوكات الألمنيوم و الخارصين النقية تجاريا هي إضافة مادة النفثالين على شكل مسحوق إلى القالب قبل صب المنصهر المعدني. بينت النتائج إن إضافة النفثالين يقلل كثيرا من تكون الحبيبات الطويلة و ينعم بنية حبيبات المسبوكة، كما إن زيادة كمية النفثالين المضافة تقلل و قد تمنع كلية تكون فجوة التقلص. إن قابلية المسبوكات للتشكيل الميكانيكي تزداد كذلك بزيادة كمية النفثالين المضافة. |
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| AbstractList | It is well established that the properties of cast metals are greatly improved by refinement of their grain size. The method employed in this study for the refinement of grain size of commercially pure aluminum and zinc castings is inoculation of naphthalene in powder form to the mould prior to pouring the molten metal. The results show that the addition of naphthalene remarkably suppresses the formation of columnar grains and refines the structure. Increasing the amount of naphthalene addition also minimizes and may eliminate the formation of the shrinkage cavity. Furthermore, the ability of castings for mechanical working increases as the naphthalene addition increases It is well established that the properties of cast metals are greatly improved by refinement of their grain size. The method employed in this study for the refinement of grain size of commercially pure aluminum and zinc castings is inoculation of naphthalene in powder form to the mould prior to pouring the molten metal. The results show that the addition of naphthalene remarkably suppresses the formation of columnar grains and refines the structure. Increasing the amount of naphthalene addition also minimizes and may eliminate the formation of the shrinkage cavity. Furthermore, the ability of castings for mechanical working increases as the naphthalene addition increases. من المعروف إن خواص المعادن المسبوكة تتحسن كثيرا بتنعيم حبيباتها، و الطريقة المستخدمة في هذه الدراسة لتنعيم حبيبات مسبوكات الألمنيوم و الخارصين النقية تجاريا هي إضافة مادة النفثالين على شكل مسحوق إلى القالب قبل صب المنصهر المعدني. بينت النتائج إن إضافة النفثالين يقلل كثيرا من تكون الحبيبات الطويلة و ينعم بنية حبيبات المسبوكة، كما إن زيادة كمية النفثالين المضافة تقلل و قد تمنع كلية تكون فجوة التقلص. إن قابلية المسبوكات للتشكيل الميكانيكي تزداد كذلك بزيادة كمية النفثالين المضافة. |
| Author | Muhammad, Asifah Mahdi |
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| SubjectTerms | Aluminum alloys aluminum and zinc castings grain refinement Mechanical properties melt inoculation Naphthalene Zinc alloy ingots Zinc alloys الخواص الميكانيكية سبائك الألومنيوم سبائك الزنك |
| Title | Effectiveness of naphthalene in grain refinement of commercially pure aluminum and zinc ingot castings |
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