Download or read book Fracture toughness and stress corrosion characteristics of high strength maraging steel written by C. S. Carter and published by . This book was released on 1970 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of heat treatment on the tensile, fracture toughness, and stress corrosion properties of a high strength maraging steel (nominal composition 16.3 Ni-12.87 Co-4.98 Mo-0.78 Ti) is described. A maximum ultimate tensile strength of 323 ksi, combined with a fracture toughness of 62 ksi sq root of in. was achieved. This strength level appears to be the maximum which can be achieved in maraging type steels without decreasing the crack tolerance below that of currently used high strength low alloy steels. Reversion to austenite did not improve either the fracture toughness or stress corrosion resistance relative to completely martensitic microstructures with equivalent strength. (Author).
Download or read book Stress corrosion Cracking in High Strength Steels and in Titanium and Aluminum Alloys written by Benjamin Floyd Brown and published by . This book was released on 1972 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fracture Toughness and Stress Corrosion Characteristics of Ultrahigh Strength 4340 Steel Summary Review written by Anthony K. Wong and published by . This book was released on 1979 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review was made of the fracture toughness (K sub Ic) and stress corrosion (K sub Iscc) characteristics of 4340 steel within the 200 to 250 ksi yield strength range. This literature review was conducted in support of a fracture mechanics and environmental investigation of 4340 steel for the control section housing of the Copperhead CLGP (Cannon-Launched Guided Projectile) weapon system. Factors affecting toughness and corrosion cracking characteristics are considered. Also included are data pertaining to the damaging effects of humidity. Fracture toughness and stress corrosion cracking resistance of 4340 steel are usually higher in the alloys possessing lower yield strengths.
Download or read book Fracture Toughness Characteristics of the New Weldable Steels of 180 to 210 Ksi Yield Strengths written by Peter P. Puzak and published by . This book was released on 1969 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The yield strength range for steels from 180 to 210 ksi is currently covered by four weldable alloys of the following nominal chemical analysis: 18%Ni-8%Co-3%Mo maraging steel, 12%Ni-5%Cr-3%Mo maraging steel, 9%Ni-4%Co-0.20%C quenched and tempered (Q and T) steel, and 10%Ni-8%Co-2%Cr-1%Mo-0.10%C Q and T steel. Broad ranges of fracture resistance have been reported for these materials based on various fracture tests, and this report presents information for material selection and design guidance by providing an analysis of the interactions between the metallurgical and mechanical parameters that contribute to the fracture resistance of plate products. Definitions of the interaction between the metallurgical and the mechanical aspects are developed with the use of the Dynamic Tear (DT) test and the Ratio Analysis Diagram (RAD). (Author).
Download or read book THE EFFECT OF TRACE IMPURITIES ON THE STRESS CORROSION CRACKING SUSCEPTIBILITY AND FRACTURE TOUGHNESS OF 18 Ni 300 GRADE MARAGING STEEL written by R. P. M. Procter and published by . This book was released on 1970 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of 18 Ni (300 grade) maraging steels of overall commercial purity but containing also deliberate impurity additions of sulphur, phosphorus, carbon, chromium and silicon plus manganese was studied. The fracture toughness and stress-corrosion resistance (determined using plane-strain fatigue-precracked specimens tested in 3.5% sodium chloride solution) of these steels was compared to the fracture toughness and stress-corrosion resistance of a commercial purity 18 Ni (300 grade) maraging steel with no deliberate impurity additions, and to a similar steel prepared from special high-purity melting stock. The most important conclusions reached are that: (i) Ultra-high purity steels do not have significantly improved stress-corrosion resistance, but show useful increases in fracture toughness when the carbon content is less than 0.005%; (ii) Simultaneous additions of Mn plus Si result in extremely low fracture toughness values; (iii) High carbon contents (greater than 0.03%) result in marginally improved stress-corrosion resistance; (iv) High Cr contents result in rather poor stress-corrosion properties. These results were correlated with the electron transmission microstructure of the steels and the results of a fractographic analysis of the fracture surfaces. (Author).
Download or read book Stress corrosion Cracking and Hydrogen stress Cracking of High strength Steel written by Ellis E. Fletcher and published by . This book was released on 1966 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-strength steels are susceptible to delayed cracking under suitable conditions. Frequently such a brittle failure occurs at a stress that is only a fraction of the nominal yield strength. Considerable controversy exists over whether such failures result from two separate and distinct phenomena or whether there is but one mechanism called by two different names. Stress-corrosion cracking is the process in which a crack propagates, at least partially, by the stress induced corrosion of a susceptible metal at the advancing tip of the stress-corrosion crack. There is considerable evidence that this cracking results from the electrtrochemical corrosion of a metal subjected to tensile stresses, either residual or externally applied. Hydrogen-stress cracking is cracking which occurs as the result of hydrogen in the metal lattice in combination with tensile stresses. Hydrogen-stress cracking cannot occur if hydrogen is prevented from entering the steel, or if hydrogen that has entered during processing or service is removed before permanent damage has occurred. It is generally agreed that corrosion plays no part in the actual fracture mechanism. This report was prepared to point out wherein the two fracture mechanisms under consideration are similar and wherein they differ. From the evidence available today, the present authors have concluded that there are two distinct mechansims of delayed failure. (Author).
Download or read book Fracture Toughness of High strength Steels for Military Applications written by J. E. Campbell and published by . This book was released on 1968 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Memorandum discusses the current situation on the inclusion of fracture-toughness testing requirements in specifications for high-strength steels used for military applications. The Memorandum was prepared at the request of The Technical Cooperation Program (TTCP), and contains information from Canadian and British members of that program, as well as U.S. information. Military applications discussed include missile motor cases, aircraft landing gear, gun tubes, armor plate, and hydrofoils. (Author).
Download or read book Report on Meeting to Review Maraging Steel Projects written by Albert M. Hall and published by . This book was released on 1962 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1980 with total page 1280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental and Metallurgical Factors of Stress corrosion Cracking in High strength Steels written by C. J. Slunder and published by . This book was released on 1961 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Source Book on Maraging Steels written by Raymond Frank Decker and published by ASM International(OH). This book was released on 1979 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASME 66 Met 5 written by J. H. Mulherin and published by . This book was released on 1966 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Metallurgy Behavior and Application of the 18 percent Nickel Maraging Steels written by Albert M. Hall and published by . This book was released on 1968 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Purity on Reliability Characteristics of High Strength Steel written by S. R. Novak and published by . This book was released on 1978 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of high purity on the mechanical properties and/or environmental-cracking properties of 4340, 18Ni (250 grade) maraging, and 10Ni-modified (AF1410) steels was investigated at a tensile-strength of about 250,000 psi. Normal- and high-purity laboratory-produced materials was tested for each steel. Only the tensile properties of the 4340 steel were determined, whereas for the 10Ni and 18Ni steels the fracture toughness and sensitivity to environmental cracking were also determined. High purity in the 10Ni and 18Ni steels resulted in significantly higher K(Ic) (Fracture toughness) values and increased resistance to stress-corrosion cracking (SCC) in 3.5 percent NaCl solution as established by longer t(inc) and slower da/dt values; high purity in the 10Ni steel increased K(Iscc) (SCC threshold) by a factor of 2.3, and no effect was found for the 18Ni steel. No significant effects of purity were found in smooth-specimen SCC tests in a marine atmosphere; however, the 10Ni steel was immune to SCC and the 18Ni steel was highly susceptible. In limited-duration (1000 hour) tests in hydrogen gas at 40 psig, the high-purity 10Ni steel exhibited no crack extension at high K(I) levels, whereas the other three steels cracked extensively at low K(I) levels. The results show that high purity can improve resistance to fracture and environmental-cracking susceptibility, but the extent of improvement is dependent on the steel-alloy system.
Download or read book Reports and Papers Delivered at Annual Meeting written by National Association of Corrosion Engineers and published by . This book was released on 1970 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Maraging Steel written by Penelope Bloom and published by . This book was released on 1964 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
