. Microstructure of changes accompanying the annealing of cast bronze (Cu88, Sn 10, Zn 2). . X o v013 9 « O o to .2-a 4} g MICROSTRUCTURAL CHANGES ACCOMPANYING THEANNEALING OF CAST BRONZE (Cu88, SnlO, Zn2) By Henry S. Rawdon CONTENTS Page I. Introduction 3 II. Aim and scope of the work 4 III. Structure of the alloy 5 1. Cast condition 5 2. Annealed state , 7 3. Transition of one form to the other 7 IV. Samples used—Preparation and treatment 7 1. Chemical composition 7 2. Preparation 8 3. Mechanical treatment 8 4. Thermal treatment 9 V. Results 10 VI. Discussion of results 13 1. Increase of cry
. Microstructure of changes accompanying the annealing of cast bronze (Cu88, Sn 10, Zn 2). . X o v013 9 « O o to .2-a 4} g MICROSTRUCTURAL CHANGES ACCOMPANYING THEANNEALING OF CAST BRONZE (Cu88, SnlO, Zn2) By Henry S. Rawdon CONTENTS Page I. Introduction 3 II. Aim and scope of the work 4 III. Structure of the alloy 5 1. Cast condition 5 2. Annealed state , 7 3. Transition of one form to the other 7 IV. Samples used—Preparation and treatment 7 1. Chemical composition 7 2. Preparation 8 3. Mechanical treatment 8 4. Thermal treatment 9 V. Results 10 VI. Discussion of results 13 1. Increase of crystal size 13 2. Persistence of the dendritic structure 13 3. Absorption of the eutectoid 14 4. Recrystallization follows only distortion 15 5. Progress of recrystallization upon heating 15 VII. Summary 17 I. INTRODUCTION Most of the questions which this study attempts to answerarose in connection with the work on the standard specimens ofzinc bronze (Cu 88, Sn 10, Zn2), described in Bureau of Stand-ards Technologic Paper No. 59. The samples were chosen fromthe series prepare
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