An Experimental Evaluation of Quenched Fe-Ga Alloys: Structural Magnetic and Magnetostrictive Properties

This study examines the effect of quenching on Fe100-x-Gax (x – 20 & 25) alloys. The long range of D03 ordering causes a minor variation in unit cell, which reduces peak intensity. This existence of D03, coupled with the A2 phase, leads to a decrease in magnetostriction in the quenched 25 at.% Ga alloy, which promotes D03 ordering. An Fe-Ga alloy having 20 at.% Ga that has been quenched possesses the A2 phase, the production of D03 is a first-order transition. Continuous ordering attempts to suppress D03 in 25 at. % Ga alloys were ineffective. Quenched Fe80-Ga20 alloy's saturation magnetization is larger than Fe75-Ga25 alloy. This suggests that lowering the nonmagnetic element Ga promotes saturation magnetization. The rise in material flaws and dislocations is due to the increased Ga content and higher quenching temperature. In a single-phase region, Fe80-Ga20 has the greatest magnetostriction at 85 ppm. Magnetostriction diminishes as Ga content rises to 25%, the D03 structure is responsible for this drop

Moulding characteristics of Sand received from M/s. Unicorn (P) Ltd., Madras

The sand sample received from M/s Unicorn (P) Ltd., Madras was investigated by N.M.L Foundry Station Industrial Estate Guindy, Madras with a view to study its suitability for foundry moulding purpose .The sand sample was yellowish in colour in "as-received" condition

An Experimental Evaluation of Quenched Fe-Ga Alloys: Structural Magnetic and Magnetostrictive Properties

627-633This study examines the effect of quenching on Fe100-x-Gax (x – 20 & 25) alloys. The long range of D03 ordering causes a minor variation in unit cell, which reduces peak intensity. This existence of D03, coupled with the A2 phase, leads to a decrease in magnetostriction in the quenched 25 at.% Ga alloy, which promotes D03 ordering. An Fe-Ga alloy having 20 at.% Ga that has been quenched possesses the A2 phase, the production of D03 is a first-order transition. Continuous ordering attempts to suppress D03 in 25 at. % Ga alloys were ineffective. Quenched Fe80-Ga20 alloy's saturation magnetization is larger than Fe75-Ga25 alloy. This suggests that lowering the nonmagnetic element Ga promotes saturation magnetization. The rise in material flaws and dislocations is due to the increased Ga content and higher quenching temperature. In a single-phase region, Fe80-Ga20 has the greatest magnetostriction at 85 ppm. Magnetostriction diminishes as Ga content rises to 25%, the D03 structure is responsible for this drop

Moulding Characteristics of GSI Sand (III)

The Sand Sample designated GSI III was received from the Geological Survey of India, Tamil Nadu Circle. The sand sample is reported to have been collected from a deposit occurring West of Nanganarkuppam near the seashore east of Cheyur (66 D/3 + 4; 12°21’: 80°00’). The sand sample was invested at the NML Foundry Station, Madras with a view to studying its suitability for foundry moulding purposes. The sand as received was light grey in colou

Moulding characteristics of GSI sand (VI)

The sand sample designated GSI VI was received from the Geological Survey of India, Tamil Nadu Circle to study its suitability for foundry moulding purposes. The sand sample is reported to have been collected from a deposit cast of Nanganarkuppam near the seashore east of Cheyur (66 D/3=4; 12°21’:80°.00’). The sand as received was deep grey in colour

Moulding characteristics of Zircon Sand

Zircon sand was received from M/S. Travanacore Minerals Co., Quilon, Kerala state to study its suitability as a foundry moulding material. The sand as received was dull brown in colour and fine in grain size. Testing methods and materials exployed: Standard methods as separated by the American Foundrymen's Society for testing sands were employed throughout the investigation using Dietert sand testing equipments. The physical properties reported are an average of three test results

Moulding Characteristics of GSI Sand (IV)

The sand sample designated GSI IV was received from the Geological Survey of India, Tamil Nadu Circle. The sand sample is reported to have been collected from a deposit east of Cheyur (66 D/3=4; 12 °21:80°.00.). The sand sample as received was dull white in colour. The sand sample was investigated at the NML F.S., Madras with a view to studying its suitability for foundry moulding purposes. The sand sample as received was dull white in colour

Moulding characteristics of GSI sand (V)

The sand sample designated GSI V was received from the Geological Survey of India, Tamil Nadu Circle to study its suitability for foundry moulding purposes. The sand is reported to have been collected from a deposit north of Nanganarkuppam near the seashore east of Cheyur (66 D/3 +4; 12°21’:80°00’)

Moulding Characteristics of Natural Moulding Sand Received from M/S Supertech Castings Ltd. Madras.

This investigation was taken up to study the moulding characteristics of the natural moulding sand received from M/s. Supertech Castings Limited, Saidapet, Madras. The sand, as received, was reddish-brown in colour. The grains were sub-angular to rounded in shape