400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (724) 776-4841 Fax: (724) 776-5760 SAE TECHNICAL PAPER SERIES 2000-01-0759 The Effect of Copper Level and Solidification Rate on the Aging Behavior of a 319-Type Cast Aluminum Alloy Carla A. Cloutier and J. Wayne Jones University of Michigan John E. Allison Ford Motor Co. Reprinted From: Casting Solutions for the Automotive Industry (SP–1504) SAE 2000 World Congress Detroit, Michigan March 6–9, 2000Downloaded from SAE International by Univ of Nottingham - Kings Meadow Campus, Sunday, August 12, 2018The appearance of this ISSN code at the bottom of this page indicates SAE’s consent that copies of the paper may be made for personal or internal use of specific clients. This consent is given on the condition,however, that the copier pay a $7.00 per article copy fee through the Copyright Clearance Center, Inc.Operations Center, 222 Rosewood Drive, Danvers, MA 01923 for copying beyond that permitted by Sec-tions 107 or 108 of the U.S. Copyright Law. This consent does not extend to other kinds of copying such ascopying for general distribution, for advertising or promotional purposes, for creating new collective works,or for resale. SAE routinely stocks printed papers for a period of three years following date of publication. Direct your orders to SAE Customer Sales and Satisfaction Department. Quantity reprint rates can be obtained from the Customer Sales and Satisfaction Department.To request permission to reprint a technical paper or permission to use copyrighted SAE publications in other works, contact the SAE Publications Group. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior wr itten permission of the publisher. ISSN 0148-7191 Copyright © 2000 Society of Automotive Engineers, Inc. Positions and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE. The author is solely responsible for the content of the paper. A process is available by which discussions will be printed with the paper if it is p ublished in SAE Transactions. For permission to publish this paper in full or in part, contact the SAE Publications Group. Persons wishing to submit papers to be considered for presentation or publication through SAE should send the manuscript or a 3 00 word abstract of a proposed manuscript to: Secretary, Engineering Meetings Board, SAE. Printed in USAAll SAE papers, standards, and selected books are abstracted and indexed in theGlobal Mobility DatabaseDownloaded from SAE International by Univ of Nottingham - Kings Meadow Campus, Sunday, August 12, 20181 2000-01-0759 The Effect of Copper Level and Solidification Rate on the Aging Behavior of a 319-Type Cast Aluminum Alloy Carla A. Cloutier and J. Wayne Jones University of Michigan John E. Allison Ford Motor Co. Copyright © 2000 Society of Automotive Engineers, Inc. ABSTRACT Compositional and microstructural variations in a casting can often result in rather significant variations in theresponse to a given aging treatment, leading to locationdependent mechanical properties. The objective of thisstudy is to determine the effect of copper content andsolidification rate on the aging behavior of a type 319 castaluminum alloy. The nominal composition of the alloy isAl-7% Si-3.5% Cu-0.25% Mg, however, typical secondary319 aluminum specifications allow copper levels to varyfrom 3-4%. Solidification rates throughout a casting canvary greatly due to, among other factors, differences insection size. To determine the effect of copper level andsolidification rate on the aging response, aging curveswere experimentally developed for this alloy. Threedifferent copper levels (3, 3.5, 4%) and two solidificationrates were used for this study. Aging temperaturesranged from 150-290°C with nine aging times at eachtemperature. The results show that both copper level andsolidification rate have an effect on the aging response atcertai