April 17, 2008 ANDREW CARNEGIE LECTURE
The Development of High Performance Steels for Landing Gear Applications
Prof. Warren M. Garrison, Jr.
Materials Science & Engineering Dept.
Carnegie Mellon University
Abstract
In the past 10 years there has been a tremendous interest in the development of new
landing gear alloys for both commercial aircraft and military aircraft. Landing gear have
usually been made of ultra-high strength low alloy steels such 300M. Landing gear
parts made of these low alloy steels are coated for corrosion protection. Despite these
coatings failure of landing gear is normally associated with fracture due to the presence
of cracks which are introduced by fatigue and which then grow by stress corrosion
cracking. There have been two major approaches to the development of new ultra-high
strength steels for landing gear. First, the Navy has begun to use high toughness
secondary hardening steels with good resistance to stress corrosion cracking for
landing gear in some aircraft. Second, there has been an interest by producers of
commercial aircraft and by the military in the development of very high strength
stainless steels with high toughness and good resistance to corrosion and stress
corrosion cracking for use in landing gear. The interest in stainless steels is driven by
a desire to eliminate coatings, particularly cadmium plating. In the first part of the talk
the development of these steels will be discussed. The second part of the talk will
discuss results to date in the development of medium carbon low alloy steels with high
strength, high toughness and good stress corrosion cracking resistance.
About the Speaker
Professor Garrison received a B.S. in Physics from the University of California,
Berkeley, an M.S. degree in Physics from the University of California, Davis and
obtained his Ph.D. in Materials Science from the University of California, Berkeley.
After spending one year as a Research Engineer at the University of California at
Berkeley, he spent three years at Sandia National Laboratories, Livermore, before
joining the Department of Materials Science and Engineering at Carnegie Mellon
University in the summer of 1984. Dr. Garrison's principal interests are the areas of
fracture and deformation, structure-property relationships and alloy development. He is
a member of The Metallurgical Society (TMS) of the AIME, ASM, AIST and Phi Beta
Kappa. He is an Associate Editor of Metallurgical and Materials Transactions A. He
holds three patents in the area of alloy development and one patent on inclusion
control in steels. Professor Garrison was elected a Fellow of ASM in 1994. Current work
is on the effect of inclusion type and composition on the toughness of low alloy ultra-
high strength steels, the effects of cobalt content and heat treatment on the mechanical
properties and microstructure of ultra-high strength stainless steels and the
development of high strength sheet steels for automotive applications.
Date: Thursday, April 17th, 2008
Location: Holiday Inn - University Center
100 Lytton Avenue - Oakland
Schedule of Events:
Cocktails ............................................. 6:00 PM
Dinner, with Graduate Presentation.... 6:30 PM
Technical Presentation................ …… 7:30 PM
Menu: choice of 3 entrées
1. Labor Day Picnic Brisket – Applewood smoked beef sliced thin & topped in a sweet
potato barbecue sauce.
2. Champagne Halibut – Marinated in Champagne & Grapes, Grilled, topped
w/artichokes, Asparagus, & Brie Buerre Blanc.
3. Pad Thai with Bean Noodles.
Cost: With Reservation At the Door
ASM Members $22.00 $27.00
Guest / Non Member $25.00 $30.00
ASM Retired / Unemployed Members $15.00 $18.00
ASM Student Members Free $10.00
Note: Student Advantage Members and ASM student members FREE with reservation!
For reservations, please call the Engineers Society of Western Pennsylvania at 412-
261-4300, or email to m.gaetano@eswp.com@eswp.com, by 4 p.m., Monday, April
14th, 2008.
To obtain driving directions, please use the Yahoo Maps below.
Prof. Warren M. Garrison, Jr.
Materials Science & Engineering Dept.
Carnegie Mellon University
Abstract
In the past 10 years there has been a tremendous interest in the development of new
landing gear alloys for both commercial aircraft and military aircraft. Landing gear have
usually been made of ultra-high strength low alloy steels such 300M. Landing gear
parts made of these low alloy steels are coated for corrosion protection. Despite these
coatings failure of landing gear is normally associated with fracture due to the presence
of cracks which are introduced by fatigue and which then grow by stress corrosion
cracking. There have been two major approaches to the development of new ultra-high
strength steels for landing gear. First, the Navy has begun to use high toughness
secondary hardening steels with good resistance to stress corrosion cracking for
landing gear in some aircraft. Second, there has been an interest by producers of
commercial aircraft and by the military in the development of very high strength
stainless steels with high toughness and good resistance to corrosion and stress
corrosion cracking for use in landing gear. The interest in stainless steels is driven by
a desire to eliminate coatings, particularly cadmium plating. In the first part of the talk
the development of these steels will be discussed. The second part of the talk will
discuss results to date in the development of medium carbon low alloy steels with high
strength, high toughness and good stress corrosion cracking resistance.
About the Speaker
Professor Garrison received a B.S. in Physics from the University of California,
Berkeley, an M.S. degree in Physics from the University of California, Davis and
obtained his Ph.D. in Materials Science from the University of California, Berkeley.
After spending one year as a Research Engineer at the University of California at
Berkeley, he spent three years at Sandia National Laboratories, Livermore, before
joining the Department of Materials Science and Engineering at Carnegie Mellon
University in the summer of 1984. Dr. Garrison's principal interests are the areas of
fracture and deformation, structure-property relationships and alloy development. He is
a member of The Metallurgical Society (TMS) of the AIME, ASM, AIST and Phi Beta
Kappa. He is an Associate Editor of Metallurgical and Materials Transactions A. He
holds three patents in the area of alloy development and one patent on inclusion
control in steels. Professor Garrison was elected a Fellow of ASM in 1994. Current work
is on the effect of inclusion type and composition on the toughness of low alloy ultra-
high strength steels, the effects of cobalt content and heat treatment on the mechanical
properties and microstructure of ultra-high strength stainless steels and the
development of high strength sheet steels for automotive applications.
Date: Thursday, April 17th, 2008
Location: Holiday Inn - University Center
100 Lytton Avenue - Oakland
Schedule of Events:
Cocktails ............................................. 6:00 PM
Dinner, with Graduate Presentation.... 6:30 PM
Technical Presentation................ …… 7:30 PM
Menu: choice of 3 entrées
1. Labor Day Picnic Brisket – Applewood smoked beef sliced thin & topped in a sweet
potato barbecue sauce.
2. Champagne Halibut – Marinated in Champagne & Grapes, Grilled, topped
w/artichokes, Asparagus, & Brie Buerre Blanc.
3. Pad Thai with Bean Noodles.
Cost: With Reservation At the Door
ASM Members $22.00 $27.00
Guest / Non Member $25.00 $30.00
ASM Retired / Unemployed Members $15.00 $18.00
ASM Student Members Free $10.00
Note: Student Advantage Members and ASM student members FREE with reservation!
For reservations, please call the Engineers Society of Western Pennsylvania at 412-
261-4300, or email to m.gaetano@eswp.com@eswp.com, by 4 p.m., Monday, April
14th, 2008.
To obtain driving directions, please use the Yahoo Maps below.
Meetings
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| September 13, 2007 Spouses’ Night Holiday Inn, Oakland October 18, 2007 Regular Meeting November 15, 2007 Pittsburgh Night Lecture December 6, 2007 Social Wine Tasting Location: Cathedral of Learning, Oakland January 17, 2008 Regular Meeting February 21, 2008 Young Member’s Night March 13, 2008 National Officer's Night April 19, 2008 Andrew Carnegie Lecture May 3, 2008 Plant Tour TBD |