Doctoral Dissertations
Abstract
"This work examines the effect of quench rate on the homogeneously and heterogeneously distributed precipitation occurring in Al-Zn-Mg-Cu commercial alloys, 7075 and 7050. Techniques used included hardness, conductivity and a differential scanning calorimetry (DSC) to understand and quantify precipitation in commercial 7075 and 7050 aluminum alloys.
The use of the Jominy End Quench test to determine quench factors for the prediction of properties was developed. In addition, the use of Jominy End Quench data to develop Time-Temperature-Property curves (C-Curves) was demonstrated.
The effect of quench rate on the width of precipitate free zone was examined. It was determined that at quench rates greater then 60°C/sec., vacancy depletion dominated. At slower quench rates, it was determined that solute depletion dominated the precipitate free zone. The critical vacancy concentration for precipitation was established as a function of quench rate"--Abstract, page iii
Advisor(s)
Newkirk, Joseph William
Committee Member(s)
Van Aken, David C.
Dharani, Lokeswarappa R.
Peaslee, Kent D., 1956-2013
Ramsay, Christopher W.
Department(s)
Materials Science and Engineering
Degree Name
Ph. D. in Metallurgical Engineering
Publisher
University of Missouri--Rolla
Publication Date
Fall 2000
Pagination
x, 134 pages
Note about bibliography
Includes bibliographical references (pages 120-131).
Rights
© 2000 Donald Scott MacKenzie, All rights reserved.
Document Type
Dissertation - Restricted Access
File Type
text
Language
English
Thesis Number
T 7854
Print OCLC #
47146392
Electronic OCLC #
1079365883
Link to Catalog Record
Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.
http://merlin.lib.umsystem.edu/record=b4641056~S5Recommended Citation
MacKenzie, Donald Scott, "Quench rate and aging effects in aluminum-zinc-magnesium-copper aluminum alloys" (2000). Doctoral Dissertations. 1374.
https://scholarsmine.mst.edu/doctoral_dissertations/1374
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