Download or read book Improving the Toughness of Ultrahigh Strength Steel written by Kōji Satō and published by . This book was released on 2002 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improving the Toughness of Ultrahigh Strength Steel written by and published by . This book was released on 2002 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ideal structural steel combines high strength with high fracture toughness. This dissertation discusses the toughening mechanism of the Fe/Co/Ni/Cr/Mo/C steel, AerMet 100, which has the highest toughness/strength combination among all commercial ultrahigh strength steels. The possibility of improving the toughness of this steel was examined by considering several relevant factors.
Download or read book Methods of Strengthening the Ultrahigh strength Steels written by William Robert Warke and published by . This book was released on 1962 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Strengthening methods for ultrahigh- trength s e ls are describ a i cus ed. The objective is to provid the designer with an idea of t e prop rti s which can be developed by various proces es and th operating personnel with an outline of procedure The processes include the conventional quench and t per, martempering, Ausforming, prestrain a d r p r, pr cipitation hardening as it applies to special steel compositions designed for this purpose (i.e., mar gi g), and austempering. Included for each method is ou line of the proces bul ion of the chanical properties whic c n be expected, iscussion of ny limitations which the process may have, and if available, an explanation of the mech nis of strengthening. (Author).
Download or read book Structure and Properties of Ultrahigh strength Steels written by and published by . This book was released on 1965 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Introduction to Today s Ultrahigh strength Structural Steels written by A. M. Hall and published by ASTM International. This book was released on 1971 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Toughening Mechanisms in Ultrahigh Strength Steels written by and published by . This book was released on 1993 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: A systems approach to materials design is extended to adaptive microstructures undergoing a programmed dynamic evolution in both processing and service to achieve novel combinations of properties. Fundamental principles are developed to support rational design of high-toughness ultrahigh-strength martensitic steels of interest for advanced armor and high performance gear applications. Theoretical modelling and high resolution microanalytical experiments in the martensitic alloys address control of autocatalytic coherent precipitation to achieve efficient strengthening without embrittlement, and the controlled precipitation of optimal stability metastable austenite for adaptive dilatant transformation plasticity tuned to crack-tip stress states for efficient interaction with strain localization processes in ductile fracture. Fracture toughness, Precipitation strengthening, Transformation toughening.
Download or read book Development of High Fracture Toughness in Maraging Steels written by Stephen D. Antolovich and published by . This book was released on 1975 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: If 300 grade maraging steel is heat-treated to contain a distribution of tough austenite in an aged martensitic matrix, the fracture toughness can be improved significantly with only minimal decreases in the ultimate tensile strength. Studies have been carried out to determine the reasons for this increase. In particular the structure has been characterized by scanning (SEM) and transmission electron microscopy (TEM), plastic zone sizes and shapes have been determined by microhardness and etching techniques, plane-strain crack tip opening displacements have been measured under loading, and fracture surfaces have been examined both by scanning and replica electron fractography. In addition, a survey of the fatigue crack propagation (FCP) characteristics have been carried out. Some testing was done at -196 C. The fracture toughness of the specially treated steel was equivalent to what was obtained for conventionally treated steel at room temperature. This process was extended to the ultra high strength 350 grade steel and again a significant improvement in toughness was obtained although the magnitude of the increase was not as large as was obtained for the 300 grade steel. A model based on the energy absorbed during plastic deformation of the austenite in the plastic enclave ahead of the crack tip has been proposed and is in good agreement with the experimental results. In some cases, heat treatments were used that result in formation of metastable austenite which transforms to martensite at crack tip on loading. This is a mode of plastic deformation that is responsible for very high toughness.
Download or read book Hot cold Working of Steel to Improve Strength written by Charles W. Marschall and published by . This book was released on 1963 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Development and Application of Very Strong Steels written by E. Ineson and published by . This book was released on 1966 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Fracture Toughness of Ultra high Strength Steels written by and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance of Mechanical Properties of Ultrahigh Strength Ferrous Steels Related to Strain Induced Transformation written by Koh-ichi Sugimoto and published by MDPI. This book was released on 2020-11-19 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: A variety of topics concerning ultrahigh-strength ferrous steels were collected in this book. At present, most of the ferrous steels are applied to cold sheet parts. However, they may be used as the materials of hot-forged parts in the future, because of the excellent performance of the mechanical properties. It is hoped that many researchers will have an interest in the applications of the ferrous steels to the hot-forging parts.
Download or read book Advanced High Strength Steel and Press Hardening Proceedings of the 3rd International Conference on Advanced High Strength Steel and Press Hardening Ichsu2016 written by Yisheng Zhang and published by World Scientific Publishing Company. This book was released on 2016-12-29 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings brings together seventy seven selected papers presented at the 3rd International Conference on Advanced High Strength Steel and Press Hardening (ICHSU2016), which was held in Xi'an, China, during August 25-27, 2016. In this rapid growing market in advanced high strength steel and press hardening, in particularly demand from automotive industry and sustainability community to develop light-weight materials for Body in white or BIW, has motivated us to organize ICHSU2016, soon after the successful conclusion of our ICHSU2015 last year to encourage experts all over the world to get together again to exchange note and ideas as how to move the R&D in press hardening technology forward in the new era. The purpose of holding ICHSU2016 is to satisfy the increasingly urgent requirement of reducing the weight of vehicle structures and increasing passenger safety. This conference arouses great interests and attentions from domestic and foreign researchers in hot stamping field, of the articles accepted, covering almost all the current topics of advanced high strength steel and press hardening technology, which includes materials & testing, modeling & simulation, process design, tribology & tools, equipment and product properties.
Download or read book An Investigation of the Role of Second Phase Particles in the Design of Ultra High Strength Steels of Improved Toughness written by and published by . This book was released on 1990 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this report summarized work carried out as part of a research program designed to improve the upper shelf fracture toughness of ultra high strength steels and to gain further understanding of the processes associated with the fracture of these materials and how these processes are related to microstructure. The results emphasized are: (a) blunting behavior and its effects on toughness, (b) the effects of inclusion spacing at constant inclusion volume fraction on toughness, (c) observations on the effects of carbides and nitrides on toughness, (d) grain size effects and (e) studies of void nucleation at inclusions and the effects on toughness of gettering sulfur as particles rich in Ti, C, and S rather than as manganese sulfide. Our blunting studies indicate that blunting to vertices, although it is associated with low work hardening, appears to result in higher levels of toughness than smooth blunting. The results show that increasing inclusion spacing at constant inclusion volume fraction results in improvements in toughness until the inclusion spacing approaches some critical value; once the inclusion spacing exceeds that value the toughness is independent of particle spacing.
Download or read book Fracture Toughness Improvement of Lower Bainite in Ultra High Strength Low Alloy Steels written by Lu Fang and published by . This book was released on 1994 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evolution of Ultrahigh strength Hardenable Steels for Solid propellant Rocket motor Cases written by H. J. Hucek and published by . This book was released on 1961 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ultrahigh Strength High Fracture Toughness Low alloy Steel written by and published by . This book was released on 2019 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Special Treatment for Developing High Toughness in Ultra high Strength Steels written by C. W. Marschall and published by . This book was released on 1958 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
