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AluminiumAlloy Bronzes

AluminiumAlloy Bronzes 160 AIRCRAFT ENGINEERING June, 1941 A Survey of Available Data on These Materials Th e Practical Application of Aluminium- High Temperatures, Magnetic Properties, Den­ fair to manufacturers of other non-ferrous Bronze . By C. II. Meigh. [McGraw-Hill. sity, Young's Modulus, Hardness and Com­ alloys, who produce alloys to very rigid speci­ 17s. 6d.] pression test values. fications and who could, if they so desired, REVIEWE D BY O. KENNEDY In the second paragraph of Chapter IV, on apply precisely the same test to many of their The designer and manufacturer of aircraft " Foundry Practice," the autho r states, " Alum­ alloys. The author's exuberance in extolling inium-Copper Alloys pass almost instantane­ engines will be familiar with several D.T.D. the many undoubted virtues of aluminium ously from the liquid to the solid state and in Specifications covering alloys which may be bronze hardly justifies such sweeping state­ doing so the metal is reduced to nine-tenths of ments. classed as aluminium bronzes. There is, its liquid volume before the commencement of however, surprisingly little essentially practical Several errors have been noticed in the text. information in compact form available con­ ordinary lineal contraction." Presumably this Figure 6 on page 8, which is described as a cerning these interesting and very useful alloys, is a misprint and the author no doubt means micro-photo of Beta Alloy, would be described and any attempt to collect and review such in­ tha t the metal is reduced to nine-tenths of its b y most metallurgists as a micro-photo of an formation is always welcomed by anyone con­ liquid volume in cooling from the liquid to Alpha-Beta alloy, the amount of Alpha con­ ordinary atmospheric temperature. The chap­ cerned in the production and applications of stituent present clearly precluding it from in­ ter deals briefly with Design, Shrinkage, Pat­ these alloys. clusion in the Beta series. terns and Chills and concludes with a paragraph This book has been written for engineers, On page 34 an extract from a work by Miller on Die-Castings. and, the author states, " As it is intended to be concludes with the words, ".. . but also a practical treatise no apology is made for the A four-page chapter on Wrought Aluminium because of their remarkable resistance to oxida­ use of simple language and elementary defini­ Bronze is followed by Chapter VI in which the tion and to attack by gases high in CO." No author describes Workshop Practice, Machining, reference to attack by gases high in CO is to be tions. " Joints, Soldering and Welding, and the final found at this point in several copies of Miller's Chapter 1 deals very briefly with the Classi­ chapter yields some information on Faults and book which have been examined. On page fication, Physical Properties and Uses of Failures. 95, Table- V which represents work done by Aluminium Bronzes. Rosenhain and Lantsberry on Mechanical I n the second chapter, the author's account An Appendix of 28 pages containing various Properties at Elevated Temperatures, the value of the micro-structure of these alloys is certainly micro-photographs and tables and a General Index conclude the volume. of 66 per cent elongation is missing from novel in its presentation, and while the engineer column V against the test value at 500 deg. C. might be quite satisfied and happy about this The author in his preface realizes that some In Table XII, page 102, the melting point of explanation of the alpha, beta and duplex of the ideas put forward may be considered con­ the element copper should read 1,083 deg. C. micro-structures, his colleague the metallurgist troversial and indeed many of the technicians instead of 1,054 deg. C. and the melting point might be rather disturbed at some of the state­ concerned with the production of aluminium of aluminium bronze given as 1,080 deg. C. ments. The terms " alpha," " beta," " delta," bronze and other non-ferrous alloys will agree should surely be much lower, say 1,030 deg.- and " duplex " are loosely employed and not with this point. 1,050 deg. C. always in accordance with their conventional On page 68, the relationship between micro- use. The inclusion of a simple copper-alumin­ structure and composition (which, incidentally, As a short and general survey of the avail­ ium equilibrium diagram and a description of is not confined to aluminium bronzes) is given able dat a on the various properties of aluminium micro-structures based on this diagram would as a basis of a control test, which consists of bronzes the book is useful, but the author's ten- probably be more welcome. The effect of casting a small specimen, polishing and subject­ dency to elaborate his own personal views, additions of manganese, iron and nickel on the ing it to microscopical examination before the which are often at variance with the conven­ micro-structures of copper-aluminium alloys, main body of the metal is poured. By this tional theories held on the various points, and the effect of mass are also discussed in this means, it is claimed, th e composition and quality together with the fact that much of the matter chapter. of the alloy may be verified. Whilst this is deals with cast products only, will be rather dis­ true, the statements " in other alloys, the appointing to the busy engineer who generally The third chapter, under the heading " Mech­ quality cannot be accurately and rapidly asks for concise, accurate, detailed information anical and Physical Properties," gives fifteen checked before the metal is cast," and " a unobscured by discussions which are of little pages of information on Mechanical Properties greater exactitude as regards analysis and practical use to him. and related micro-structure, Crystal Slip and mechanical properties is obtainable in alumin­ Strain Hardening, Work-hardening, Resistance The binding, paper, type and illustrations ium bronze than in other alloys," are hardly to Fatigue, Corrosion and Wear, Stability at are of excellent quality. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

AluminiumAlloy Bronzes

Aircraft Engineering and Aerospace Technology , Volume 13 (6): 1 – Jun 1, 1941
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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb030783
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Abstract

160 AIRCRAFT ENGINEERING June, 1941 A Survey of Available Data on These Materials Th e Practical Application of Aluminium- High Temperatures, Magnetic Properties, Den­ fair to manufacturers of other non-ferrous Bronze . By C. II. Meigh. [McGraw-Hill. sity, Young's Modulus, Hardness and Com­ alloys, who produce alloys to very rigid speci­ 17s. 6d.] pression test values. fications and who could, if they so desired, REVIEWE D BY O. KENNEDY In the second paragraph of Chapter IV, on apply precisely the same test to many of their The designer and manufacturer of aircraft " Foundry Practice," the autho r states, " Alum­ alloys. The author's exuberance in extolling inium-Copper Alloys pass almost instantane­ engines will be familiar with several D.T.D. the many undoubted virtues of aluminium ously from the liquid to the solid state and in Specifications covering alloys which may be bronze hardly justifies such sweeping state­ doing so the metal is reduced to nine-tenths of ments. classed as aluminium bronzes. There is, its liquid volume before the commencement of however, surprisingly little essentially practical Several errors have been noticed in the text. information in compact form available con­ ordinary lineal contraction." Presumably this Figure 6 on page 8, which is described as a cerning these interesting and very useful alloys, is a misprint and the author no doubt means micro-photo of Beta Alloy, would be described and any attempt to collect and review such in­ tha t the metal is reduced to nine-tenths of its b y most metallurgists as a micro-photo of an formation is always welcomed by anyone con­ liquid volume in cooling from the liquid to Alpha-Beta alloy, the amount of Alpha con­ ordinary atmospheric temperature. The chap­ cerned in the production and applications of stituent present clearly precluding it from in­ ter deals briefly with Design, Shrinkage, Pat­ these alloys. clusion in the Beta series. terns and Chills and concludes with a paragraph This book has been written for engineers, On page 34 an extract from a work by Miller on Die-Castings. and, the author states, " As it is intended to be concludes with the words, ".. . but also a practical treatise no apology is made for the A four-page chapter on Wrought Aluminium because of their remarkable resistance to oxida­ use of simple language and elementary defini­ Bronze is followed by Chapter VI in which the tion and to attack by gases high in CO." No author describes Workshop Practice, Machining, reference to attack by gases high in CO is to be tions. " Joints, Soldering and Welding, and the final found at this point in several copies of Miller's Chapter 1 deals very briefly with the Classi­ chapter yields some information on Faults and book which have been examined. On page fication, Physical Properties and Uses of Failures. 95, Table- V which represents work done by Aluminium Bronzes. Rosenhain and Lantsberry on Mechanical I n the second chapter, the author's account An Appendix of 28 pages containing various Properties at Elevated Temperatures, the value of the micro-structure of these alloys is certainly micro-photographs and tables and a General Index conclude the volume. of 66 per cent elongation is missing from novel in its presentation, and while the engineer column V against the test value at 500 deg. C. might be quite satisfied and happy about this The author in his preface realizes that some In Table XII, page 102, the melting point of explanation of the alpha, beta and duplex of the ideas put forward may be considered con­ the element copper should read 1,083 deg. C. micro-structures, his colleague the metallurgist troversial and indeed many of the technicians instead of 1,054 deg. C. and the melting point might be rather disturbed at some of the state­ concerned with the production of aluminium of aluminium bronze given as 1,080 deg. C. ments. The terms " alpha," " beta," " delta," bronze and other non-ferrous alloys will agree should surely be much lower, say 1,030 deg.- and " duplex " are loosely employed and not with this point. 1,050 deg. C. always in accordance with their conventional On page 68, the relationship between micro- use. The inclusion of a simple copper-alumin­ structure and composition (which, incidentally, As a short and general survey of the avail­ ium equilibrium diagram and a description of is not confined to aluminium bronzes) is given able dat a on the various properties of aluminium micro-structures based on this diagram would as a basis of a control test, which consists of bronzes the book is useful, but the author's ten- probably be more welcome. The effect of casting a small specimen, polishing and subject­ dency to elaborate his own personal views, additions of manganese, iron and nickel on the ing it to microscopical examination before the which are often at variance with the conven­ micro-structures of copper-aluminium alloys, main body of the metal is poured. By this tional theories held on the various points, and the effect of mass are also discussed in this means, it is claimed, th e composition and quality together with the fact that much of the matter chapter. of the alloy may be verified. Whilst this is deals with cast products only, will be rather dis­ true, the statements " in other alloys, the appointing to the busy engineer who generally The third chapter, under the heading " Mech­ quality cannot be accurately and rapidly asks for concise, accurate, detailed information anical and Physical Properties," gives fifteen checked before the metal is cast," and " a unobscured by discussions which are of little pages of information on Mechanical Properties greater exactitude as regards analysis and practical use to him. and related micro-structure, Crystal Slip and mechanical properties is obtainable in alumin­ Strain Hardening, Work-hardening, Resistance The binding, paper, type and illustrations ium bronze than in other alloys," are hardly to Fatigue, Corrosion and Wear, Stability at are of excellent quality.

Journal

Aircraft Engineering and Aerospace Technology – Emerald Publishing

Published: Jun 1, 1941

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