The Role of Hydrogen and Other Interstitials in the Mechanical Behavior of Metals

This is the Thirty-fourth Edward De Mille Campbell Memorial Lecture, presented by Alexander R. Troiano, Chairman, Department of Metallurgical Engineering, Case Institute of Technology, Cleveland. The lecture was presented November 4, 1959 during the Forty-first Annual Convention of the American Society for Metals, held in Chicago. This text is reproduced without change from the Campbell Memorial Lecture as delivered before the American Society for Metals.