Biographical sketch:

Dr. Langford, a co-founder of Amenex Associates, has over 35 years of experience as a metallurgist, scientist, consultant, failure analyst, and expert witness. He has investigated hundreds of materials-related problems for a variety of clients covering the areas of corrosion, mechanical and dimensional analysis, physical, mechanical and chemical metallurgy, metallography, microstructural analysis, and optical and electron microscopy.

Dr. Langford's Resume:

EDUCATION:

1959    S.B. Metallurgy, Massachusetts Institute of Technology
1966    Sc.D. Metallurgy, Massachusetts Institute of Technology

PROFESSIONAL EXPERIENCE:

1986-Present
Vice President and Principal Consultant,
Amenex Associates, Inc., Westtown, PA 19395

Co-founder of metallurgical consulting firm equipped for scanning electron microscopy with wavelength- and energy-dispersive X-ray spectrometers, library research, metallographic specimen preparation, optical microscopy, high-speed dilatometry, field metallography and hardness testing. Responsible for technical direction, research and development, and project management. Author of over 600 project reports on such subjects as broken medical devices, life extension in electrical-utility high-energy piping systems, mechanical metallurgy of firearms, a ruptured rubber expansion joint, gearbox failures, fractured lifting swivels, metallurgical thermochemistry, welding and corrosion problems, and high-temperature oxidation and creep rupture.

1981-1986
Principal Consultant and Manager of Metallurgy Department,
Lehigh Testing Laboratories, Inc., New Castle, DE 19320

Principal investigator for metallurgical failure analysis, materials, problems, process development, industrial trouble-shooting and forensic metallurgy. Author of 180 project reports. Scope of work included all aspects of physical, mechanical and process metallurgy, corrosion, welding,design of test equipment, thermodynamics, heat transfer, nondestructive testing, chemical analysis, X-ray diffraction and electron microscopy.

1975-1981
Associate Professor, Department of Materials Engineering,
Drexel University, Philadelphia, PA 19104

Principal investigator for two federally funded research projects: Strain Hardening of Heavily Deformed Iron, and Casting by Diffusion Solidification. Instructor for ten graduate and undergraduate courses, including fundamentals of materials, physical, mechanical and powder metallurgy, deformation processing, X-ray metallography, process modelling and optimization, and failure analysis. Supervisor of three successful Ph.D. candidates. Built a solidification laboratory with two vacuum induction melting furnaces and an inert-gas atomization facility. Developed twelve audio-visual teaching aids on microstructural failure analysis. Prepared five publications, six major research reports, and ten research proposals.

1972-1975
Research Specialist, Monsanto Triangle Park Development Center,
Research Triangle Park, NC 27709

Responsible for the physical and mechanical metallurgy of steel wire, both as conventionally drawn through diamond dies and also as cast directly from the melt by inviscid spinning; exploratory research in casting of carbon and alloy steels by forced liquid infiltration according to his own inventions and theoretical analyses. Three major reports, two publications, and seven patent disclosures.

1966-1971
Scientist, Edgar C. Bain Laboratory for Fundamental Research,
U.S. Steel Corporation, Monroeville, PA 15146

Fundamental research on processing/microstructure/strengthening mechanisms in heavily deformed iron and steel. Major operator of one-million-volt transmission electron microscope; developed high-resolution, electron-diffraction method for orientation mapping of cellular dislocation substructure which showed that reciprocal cell size and cellular misorientations are together responsible for the persistently linear strain hardening of drawn iron wire. Eight publications.

1963-1966
Research Assistant in the Metallurgy Department,
Massachusetts Institute of Technology, Cambridge, MA 02139

Responsible for conducting sponsored research and doctoral dissertation on the fundamental differences in strain hardening between the major crystalline forms of metals and alloys. Developed empirical and theoretical methods of analysis for designing wire-drawing dies for maximum homogeneity of deformation and for performing tensile and compression tests on mechanically unstable materials. Completed requirements for Sc.D. degree in metallurgy.

1959-1962
Instructor in the Metallurgy Department,
Massachusetts Institute of Technology, Cambridge, MA 02139

Responsible for developing, demonstrating and running two undergraduate laboratory courses in physical metallurgy; responsible for grading quizzes, homework and final examinations in five physical metallurgy courses, both graduate and undergraduate. Developed laboratory experiments in stress relaxation in polymers and dislocation substructure in silicon iron by etch-pit techniques.

RESEARCH INTERESTS:

Strain hardening, microstructure and mathematical modelling of heavily deformed metals; steelmaking by diffusion solidification; atomization of liquid metals; design of mechanical working and testing equipment; quantitative electron metallography; mechanical properties and deformation of polymers; innovative handling and treatment of liquid metals, including manufacture of refractory cloth filters for cast iron; process modelling and optimization; failure analysis; electronic leak detection and location in lined aqueous impoundments.

PROFESSIONAL SOCIETIES:

American Society for Metals
American Association for the Advancement of Science

HONORARY SOCIETIES:

Sigma Xi, for scientific research.
Legion of Honor, Chapel of Four Chaplains, for service to others.

THESES:

G. Langford: Work Hardening of Cubic Metals at Very High Strains,
MIT Sc.D. Thesis; advisor: Dr. Morris Cohen.

G. Langford: Effect of Prior Deformation on Strain Aging in Low Carbon Steel,
MIT S.B. Thesis; Advisor: Dr. David A. Thomas.

PUBLICATIONS:

R. C. Glenn, G. Langford and A. S. Keh: Electron Microscope Observations of Wire-Drawn and Rolled Steel in Two and Three Orthogonal Sections, Transactions American Society for Metals (ASM), 1969, Vol. 62, p. 285.

G. Langford and Morris Cohen: Strain Hardening of Iron by Severe Plastic Deformation, Transactions ASM, 1969, Vol. 62, p. 623. This paper is rated a "Citation Classic" by the Institute for Scientific Information, publisher of Current Contents.

G. Langford: A Study of the Deformation of Patented Steel Wire, Metallurgical Transactions, 1970, Vol. 1, p. 465.

G. Langford and Morris Cohen: Calculation of Cell-Size Strengthening of Wire-Drawn Iron, Metallurgical Transactions, 1970, Vol. 1, p. 1478.

G. Langford and Morris Cohen: Dynamic Recovery of Iron During Severe Plastic Deformation, Proc. Second International Conference on the Strength of Metals and Alloys, ASM, Cleveland, Ohio (1970), p. 475.

G. Langford, P. K. Nagata, R. J. Sober and W. C. Leslie: Plastic Flow in Binary Substitutional Alloys of BCC Iron - Effects of Wire Drawing and Alloy Content on Work Hardening and Ductility, Metallurgical Transactions, 1972, Vol. 3, p. 1843.

G. Langford and Morris Cohen: Microstructural Analysis of Severely Drawn Iron Wires by High-Voltage Electron Diffraction, Metallurgical Transactions, 1975, Vol. 6A, p. 901.

G. Langford: Deformation of Pearlite, Metallurgical Transactions, 1977, Vol. 8A, p. 861.

G. Langford: High Speed Steel Made by Liquid Infiltration, Materials Science and Engineering, 1977, Vol. 28, p. 275.

G. Langford and R. E. Cunningham: Steel Casting by Diffusion Solidification, Metallurgical Transactions, 1978, Vol. 9B, p. 5.

A. Razavi and G. Langford: Strain Hardening of Iron - Axisymmetric vs. Plane Strain Elongation, Proc. Fifth International Conference on the Strength of Metals and Alloys, Pergamon Press, Frankfurt (1979), p. 831.

M. Paliwal, D. Apelian and G. Langford: Performance of a Porous Refractory Valve for Liquid Metals, Metallurgical Transactions, 1980, Vol. 11B, p. 39.

G. Langford: Hardness, in the Kirk-Othmer Encyclopedia of Chemical Technology,Vol. 12, Third Ed., Wiley, New York, 1980, p. 118.

G. Langford and D. Apelian: Diffusion Solidification, Journal of Metals, Vol. 32, (no. 9),
1980, p. 28.

G. Langford: Casting of Copper Alloys by Diffusion Solidification, Transactions American Foundrymens Society, 1981, Vol. 69, p. 621.

Note: Approximately seven papers based in part on the research work of Dr. Langford and his three Ph.D. students when at Drexel University are in process; four of these are in final manuscript form and are in review. The titles of the three doctoral theses on which most of these papers are based are:

Dr. Harry Sreshta: Diffusion Solidification Kinetics and Casting Machine Design.

Dr. Muktesh Paliwal: The Diffusion Solidification Process: Particle Valve; Microsegregation; Structure & Properties.

Dr. Ali Razavi: The Influence of Mode of Deformation on Strain Hardening of Iron at Low Temperature and High Strains.

Legal Experience (sworn testimony)
List available on this website

Contact Information

George Langford, Sc.D.
c/o Amenex Associates, Inc.
Post Office Box 1041
Westtown, PA 19395-1041
(610) 647-5828 (voice)
(fax) - [same as above, but call first !]

This page last updated on January 5, 2004.