May/June_AMP_Digital

A D V A N C E D M A T E R I A L S & P R O C E S S E S | M A Y / J U N E 2 0 1 8 7 NEW STEEL SUITS AEROSPACE APPLICATIONS 300M steel is widely used for high stress aircraft landing gears and struc- tures, although it is not corrosion resis- tant and requires protective coatings. Plating of 300M steel involves using cadmium for corrosion resistance on external surfaces and chrome for wear resistance on internal surfaces. A new nontoxic zinc-nickel coating is in devel- opment, but it does not solve the corro- sion problem if it cracks. Ultimately, the use of stainless steel provides a more robust solution, reducing maintenance time and corrosion-related repairs. New cobalt-free, quenched and tempered high-strength corrosion re- sistant steel (HSCR steel) has similar strength, ductility, and toughness as 300M steel and also possesses corro- sion resistance in salt spray testing. The production cost of vacuum melted and forged HSCR steel bars is estimated at $8-10/lb while the cost of the same bars of 300M steel is $4-6/lb. Aero- space applications of wrought HSCR steel include landing gear components, rotatable shafts, actuators, flap tracks, and others. Modification of HSCR steel is appli- cable for casting, including investment casting, sand casting, and other casting OMG! OUTRAGEOUS MATERIALS GOODNESS in the fall. Nominees are judged on cri- teria such as significant achievement toward improving and expanding the use of titanium; promoting titanium into new applications or enhancing the performance of titanium in an existing application; or unveiling a technical breakthrough that expands titanium use. Deadline is June 30. For more in- formation, visit titanium.org . GRAPHENE DOUBLES AS HAIR DYE techniques. Cast HSCR steel possesses >50% in- creased strength over cast 17-4 PH stainless at the same ductility and tough- ness. Corrosion resistance of cast HSCR steel is lower than cast 17-4 PH stain- less and is comparable with cast 420 martensitic stainless. Aerospace ap- plications of investment cast HSCR steel include components for hydrau- lic fluids, motion control, actuation systems, cargo systems, bearing cages, and others. High strength, corrosion resistance, and relatively low cost make HSCR steel suitable for the oil/gas, automotive, and shipbuilding industries as well. amdoncorp.com. TITANIUM AWARD PAYS $20K The International Titanium Asso- ciation (ITA) is seeking award nomina- tions for an individual or organization who demonstrates significant achieve- ment toward improving and expanding the use of titanium. The Titanium Ap- plications Development (TAD) Award, now in its 12th year, is accepting ap- plications for the $20,000 prize to be presented at ITA’s annual conference Bundles of blonde hair before and after coating with r-GO/chitosan dye with increasing graphene concentrations. Ronn Dunnett won the 2016 TAD Award for his use of titanium in Dunnett Classic Titanium snare drums, a drum tuning device, and a bass drumpedal. A widely recognized problem among beauty professionals and their clients is that coloring hair too often can cause irreparable damage to del- icate strands. Now, a Northwestern University team is using graphene to develop a new dye that is nontoxic and lasts through 30 washes without fading. Jiaxing Huang, a professor of materi- als science and engineering, and his team bypassed harmful dye chemicals by leveraging the natural geometry of graphene sheets. While current hair dyes use a cocktail of small molecules that work by chemically altering the hair, graphene sheets are soft and flex- ible, so they wrap around each strand for an even coat. Huang’s graphene- based dyes are available in multiple shades of brown and black, with addi- tional colors coming soon. mccormick. northwestern.edu. Aircraft landing gear are routinely subjected to severe loads, corrosion, and adverse environmental conditions. Courtesy of NASA.