返回Google圖書搜尋

Strain Aging and Delayed Failure in High-strength Steels

出版	Directorate of Materials and Processes, Aeronautical Systems Division, Air Force Systems Command, United States Air Force, 1962
URL	http://books.google.com.hk/books?id=gIN3A15nL_0C&hl=&source=gbs_api

註釋Spontaneous strain aging which occurs during tensile testing was examined for several high-strength steels. The results of smooth and notch tensile tests indicated that significant strain aging effects occurred in most high-strength steels in the 300 F to 800 F temperature range and this behavior was analogous to "blue brittleness" in mild steels. Constant load, stress rupture tests were conducted on the steels to determine the possible relationship between strain-aging embrittlement and delayed failure. Only the 300 M steel tested at 400 F exhibited an appreciable degree of delayed failure. This embrittlement, was extremely sensitive to test environment and was elimiriated when tests were conducted in argon. Although strain aging was not a sufficient condition to initiate delayed failure, it appeared to increase the severity of the environmental effects in the particular range where sufficient interstitial mobility existed.