Patents by Inventor Martin J. RAWSON
Martin J. RAWSON has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Publication number: 20240075587Abstract: A method of manufacturing a component includes supporting the component on a mounting structure. The method further includes impacting first peening bodies on the component to increase sub-surface compressive residual stresses of the component. The first peening bodies impact the component at a first intensity of from about 0.45 mmA to about 0.61 mmA. A first coverage of the component by the first peening bodies is from about 120% to about 205%. The method further includes impacting second peening bodies on the component to increase surface compressive residual stresses of the component. The second peening bodies impact the component at a second intensity of from about 0.20 mmA to about 0.30 mmA. A second coverage of the component by the second peening bodies is from about 120% to about 205%. Each of the first peening bodies and the second peening bodies includes a ceramic material.Type: ApplicationFiled: August 21, 2023Publication date: March 7, 2024Applicant: ROLLS-ROYCE plcInventors: Martin J. RAWSON, Aleksej MOLOKANOV, John HETHERINGTON
-
Patent number: 10995395Abstract: Maraging steel alloys are disclosed. The alloys are produced by microalloying of the maraging steel alloy to form carbides at prior austenite grain boundaries to increase Zener drag. A particular example alloy consists essentially of, by weight, 7.4 to 8.4 percent nickel, 7.6 to 8.6 percent chromium, 8.4 to 9.4 percent cobalt, 1.8 to 2.2 percent molybdenum, 2 to 2.6 percent tungsten, 1.6 to 2 percent aluminium, 0.05 to 0.08 percent carbon, a carbide former selected from the group consisting of: niobium at a concentration of 0.25 to 0.28 percent; titanium, at a concentration of 0.2 to 0.28 percent; and vanadium, at a concentration of 0.21 to 0.4 percent; the balance being iron and incidental impurities.Type: GrantFiled: March 8, 2019Date of Patent: May 4, 2021Assignee: ROLLS-ROYCE plcInventors: Harshad K Bhadeshia, Paul O Hill, Martin J Rawson, Dominik J Dziedzic, Zixin Huang
-
Publication number: 20200282448Abstract: A method of manufacturing a component, the method including a maraging steel blank with an initial shape; and performing an incremental cold forming operation on the maraging steel blank, wherein the incremental cold forming operation reduces a thickness of the maraging steel blank.Type: ApplicationFiled: March 5, 2020Publication date: September 10, 2020Applicant: ROLLS-ROYCE plcInventors: Martin J. RAWSON, Paul O. HILL, Martin TUFFS, Carl BOETTCHER
-
Publication number: 20200016661Abstract: A method of fabricating a component having an internal void, the method comprising the steps of: i) providing a core having a shape corresponding to the internal void of the component; ii) compacting a powder around the core to form a compacted powder body around the core; iii) removing the core; and iv) heating the compacted powder body to consolidate the compacted powder body.Type: ApplicationFiled: July 11, 2019Publication date: January 16, 2020Inventors: Daniel Clark, Martin J. Rawson, Alan A. Pardoe
-
Patent number: 10457996Abstract: A nanocrystalline bainitic steel consisting of, by weight percentage: 0.3% to 0.6% carbon; 9.0% to 20.0% nickel; up to 10% cobalt; 1.0% to 4.5% aluminium; up to 0.5% molybdenum; up to 0.5% manganese; up to 0.5% tungsten; up to 3.0% chromium; and the balance being iron and impurities.Type: GrantFiled: February 23, 2017Date of Patent: October 29, 2019Assignee: ROLLS-ROYCE plcInventors: Paul O Hill, Steve W Ooi, Christopher N Hulme-Smith, Harshad K Bhadeshia, Martin J Rawson, Mathew J Peet
-
Publication number: 20190309400Abstract: Maraging steel alloys are disclosed. The alloys are produced by microalloying of the maraging steel alloy to form carbides at prior austenite grain boundaries to increase Zener drag. A particular example alloy consists essentially of, by weight, 7.4 to 8.4 percent nickel, 7.6 to 8.6 percent chromium, 8.4 to 9.4 percent cobalt, 1.8 to 2.2 percent molybdenum, 2 to 2.6 percent tungsten, 1.6 to 2 percent aluminium, 0.05 to 0.08 percent carbon, a carbide former selected from the group consisting of: niobium at a concentration of 0.25 to 0.28 percent; titanium, at a concentration of 0.2 to 0.28 percent; and vanadium, at a concentration of 0.21 to 0.4 percent; the balance being iron and incidental impurities.Type: ApplicationFiled: March 8, 2019Publication date: October 10, 2019Applicant: ROLLS-ROYCE plcInventors: Harshad K. BHADESHIA, Paul O. HILL, Martin J. RAWSON, Dominik J. DZIEDZIC, Zixin HUANG
-
Publication number: 20190162286Abstract: A gear comprising: a hub defining an outer surface, the hub comprising a ceramic material; and a first ring defining an inner surface and an outer surface, the inner surface of the first ring being coupled to the outer surface of the hub via a bond, the outer surface of the first ring defining a plurality of gear teeth, and the first ring comprising a metallic material.Type: ApplicationFiled: November 8, 2018Publication date: May 30, 2019Applicant: ROLLS-ROYCE plcInventors: Daniel CLARK, Martin J. RAWSON
-
Publication number: 20170275716Abstract: A nanocrystalline bainitic steel consisting of, by weight percentage: 0.3% to 0.6% carbon; 9.0% to 20.0% nickel; up to 10% cobalt; 1.0% to 4.5% aluminium; up to 0.5% molybdenum; up to 0.5% manganese; up to 0.5% tungsten; up to 3.0% chromium; and the balance being iron and impurities.Type: ApplicationFiled: February 23, 2017Publication date: September 28, 2017Applicant: ROLLS-ROYCE plcInventors: Paul O HILL, Steve W OOI, Christopher N HULME-SMITH, Harshad K BHADESHIA, Martin J RAWSON, Mathew J PEET
-
Patent number: 9217186Abstract: The invention provides an alloy steel having the following composition: Ni 5-14 wt %; Cr 4-16 wt %; Co 7-14 wt %; Mo 1-5 wt %; W 0-5 wt %; Ti 0-0.8 wt %; Al 0.1-3 wt %; the balance being Fe save for incidental impurities. This provides an ultra-high strength corrosion resistant steel with good toughness, which does not significantly creep at temperatures up to 450° C. The high quantity of alloying to elements, particularly chromium, also gives the alloy good corrosion resistance. The alloy is particularly suitable for main shafts of gas turbine engines.Type: GrantFiled: September 14, 2011Date of Patent: December 22, 2015Assignee: ROLLS-ROYCE PLCInventors: Andrew T W Barrow, Harshad K D H Bhadeshia, Martin J. Rawson, Paul O Hill
-
Publication number: 20120080124Abstract: The invention provides an alloy steel having the following composition: Ni 5-14 wt %; Cr 4-16 wt %; Co 7-14 wt %; Mo 1-5 wt %; W 0-5 wt %; Ti 0-0.8 wt %; Al 0.1-3 wt %; the balance being Fe save for incidental impurities. This provides an ultra-high strength corrosion resistant steel with good toughness, which does not significantly creep at temperatures up to 450° C. The high quantity of alloying to elements, particularly chromium, also gives the alloy good corrosion resistance. The alloy is particularly suitable for main shafts of gas turbine engines.Type: ApplicationFiled: September 14, 2011Publication date: April 5, 2012Applicant: ROLLS-ROYCE PLCInventors: Andrew T.W. BARROW, Harshad K.D.H. BHADESHIA, Martin J. RAWSON, Paul O. HILL
-
Publication number: 20100247368Abstract: A bainitic steel alloy and a method for making such an alloy are disclosed, in which the bainite plates are particularly small, less than 50 nanometres in width. In preferred embodiments of the invention, each bainite plate is surrounded by a film of retained austenite; the level of retained austenite in the alloy is greater than 10%; and the alloy is substantially free of blocky unstable austenite and cementite.Type: ApplicationFiled: March 10, 2010Publication date: September 30, 2010Applicant: ROLLS-ROYCE PLCInventors: Martin J. RAWSON, Mathew J. PEET, Harshad K.D.H BHADESHIA, Scott D. WOOD, Paul O. HILL, Emma E. BOOTH