HEAT TREATMENT OF WROUGHT AND CAST ALUMINUM
Saturday, March 1, 2003 8:30am-5:00pm
Sunday, March 2, 2003 8:30am-5:00pm
Murat Tiryakioglu, Robert Morris University
James T. Staley, Consultant
Members $645, Non-members $735
Sponsored by: TMS
Light Metals Division
Who Should Attend:
This 2-day course is intended for metallurgists, engineers, and
technicians employed in either research or operations at facilities
where cast or wrought aluminum alloy products are heat treated. Operations
both at producers and users will be covered.
The course combines theory with many practical examples. Strengthening
mechanisms in aluminum alloy products are first reviewed. Then the general
principles of precipitation hardening including phase diagrams are discussed.
This is followed by an overview of the metallurgy of heat treatment.
The hardening precipitates in the major alloys will be identified. A
major element of the course is a description of how to use simple kinetic
equations to predict effects of quenching and aging on properties. Graphical
computer programs that illustrate these points will be demonstrated.
Contents of the course include solution heat treatment of castings with
emphasis on homogenization and rounding of Si particles and effects
of time and temperature. Discussion of the important step of quenching
will include quench sensitivity; water quenching and geometry; and effects
of quench on residual stress, distortion, corrosion, strength, and fracture
toughness. Examples will be taken from 3XX, 2XXX, 7XXX, and 6XXX alloys.
A method of predicting the properties using a Time-Temperature-Property
C-Curve and a cooling curve will be described, and the difference between
T-T-P and C-C-P (Continuous Cooling Property) Curves will be explained.
Interactions between quenching and aging will also be covered. Examples
of natural aging and effects of time and temperature of artificial aging
will then be discussed. Examples of the contrasting effects of cold
work prior to aging 2XXX and 7XXX alloy products will be shown and reasons
for the behaviors discussed. Multi-step aging treatments will also be
discussed with emphasis on T7 aging of 7XXX alloy products and low-high
temperature aging of Al-Si castings.
Other Short Courses:
Below is a list of the other short courses that are scheduled for the
TMS Annual Meeting and Exhibition: