Search Results for vacuum solution nitriding

Vacuum solution nitriding is a promising technique for increasing the surface hardness, load-bearing capability, and fatigue strength of martensitic stainless steels without sacrificing corrosion resistance. This article examines the effects of nitriding pressure and temperature on surface nitrogen content and case depth in four martensitic stainless steels.

Using advanced characterization techniques on surface hardened steels builds a richer understanding of the underlying metallurgical phenomena.

Titanium boron composite coatings with superior wear performance were selected for use in materials experiments on the International Space Station. The titanium-boron nitride composite coatings were prepared using an atmospheric plasma spray technique from engineered composite powders. The coatings were subjected to extensive characterization and tribological studies. The results show tremendous improvement in the wear performance.

Laser surface modification (LSM) techniques provide new pathways to improving the performance of engineered structures and components, either by altering surface metallurgy or chemistry or by adding a functional surface layer.

Custom equipment designed for the deposition of exotic materials allows advanced coating solutions and ceramic matrix composites to be utilized for applications in automotive, aerospace, defense, energy, and the farthest reaches of space. This article describes custom systems for chemical vapor deposition and advanced materials processing.

New thermal spray methods optimized for the production of functional coatings are bridging the gap between traditional thermal spraying and thin-film deposition technologies. Two such methods, one known alternately as very low pressure plasma spraying (VLPPS) or plasma spray-physical vapor deposition (PS-PVD) and one called thin-film thermal spray chemical vapor deposition (CVD), are briefly reviewed here.

This article compares heat treat processes and furnace types that are typically used to harden gears.

Boriding is performed by diffusing boron atoms into a metal surface and allowing the boron to react with elements present in the substrate to form metal-boride compounds. Upon diffusing enough boron into the surface, a metal-boride compound layer with high hardness precipitates and grows below the surface of the part. This article discusses boriding of ferrous alloys, including a new deep case boriding method that produces wear layer depths comparable to competitive processes such as carburizing, nitriding, thermal spray coatings, and hardfacing.

Members of the Center for Heat Treating Excellence are finding creative ways to bring awareness to careers in heat treating in order to recruit and retain top-notch talent.

High-strength, corrosion-resistant steel is proposed as a cost-effective alternative to titanium alloys due to its high specific strength, high fatigue strength, good toughness, and corrosion resistance.

Understanding both the origin and procedures for removing inclusions in magnesium alloys results in castings with enhanced mechanical and corrosion properties. This article provides an overview of typical inclusions found in magnesium and its alloys, various techniques used to determine inclusion content, and methods employed to reduce inclusions and their influence on properties.

New electrical, mechanical, and chemical testing capabilities give scanning electron microscopes the feel of a self-contained “nano-laboratory.” Several developments in SEM technology allow new and more flexible approaches to the analysis of novel systems, such as Li battery-related materials, nanostructured and nanoporous materials, and novel approaches to 3D analysis.

Optimizing the integrity and performance of highly engineered surfaces and structures requires the ability to visualize and understand material behavior over multiple length and time scales from a three-dimensional perspective. The Electron Microscopy Centre at the University of Manchester is equipped for such work as demonstrated in problem-solving scenarios involving multiscale imaging and analysis of the progression of intergranular corrosion in Al alloy 2024, the catalytic effect of silver nanoparticles in seawater, recrystallization in a volume element of a bronze alloy, and defect progression on graphene surfaces.

News about ASM members, chapters, events, awards, conferences, affiliates, and other society activities. Topics include: ASM names 2015 award recipients; Park Metallurgical/Heatbath Corporation in Detroit is selected for a 2015 ASM Historical Landmark Award; ASM student board members for 2015-2016 announced; Stan Theobald, former ASM Managing Director, retires from ASM; author spotlight for George Krauss; volunteer profile for Steve Brubaker.

News about ASM members, chapters, events, awards, conferences, affiliates, and other society activities. Topics include: ASM announces 2016 award recipients; Alcoa Inc., Tennessee Operations North Plant, was selected for a 2016 ASM Historical Landmark Award; ASM selects student board members for 2016-2017; volunteer profile for James Callahan; professional profile for Amber N. Black.