http://www.ntis.gov/rss/RSSNTISCategoryList.aspxNational Technical Reports Libraryen(c) 2008, National Technical Information Service. All rights reserved.5http://www.ntis.gov/images/logoRSS.jpghttp://www.ntis.govBallistic tests were conducted on a high manganese and high aluminum austenitic steel that is age hardenable. These lightweight steels (12 to 18% lower in density) were investigated as alternatives to MIL-PRF- 32269 steel alloys for application in P9 ...http://www.ntis.gov/search/product.aspx?ABBR=ADA504465Atomic layer deposition (ALD) was used to deposit an alternative dielectric barrier layer for use in radio frequency microelectromechanical systems (rf MEMS). The layer is an alloy mixture of Al2O3 and ZnO and is proposed for use as charge dissipativ ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506124Aluminum powders have long been used as additives in propellants, pyrotechnics and explosives. Aluminum has a high enthalpy of combustion but relatively low burn rate. Addition of reactive nanocomposite powders can increase the burn rate of aluminum ...http://www.ntis.gov/search/product.aspx?ABBR=ADA50619914. ABSTRACT This report summarize the analysis and cyclic testing of a laser welded steel sandwich panel end connection. Also included are monotonic tests of stake welded lap shear coupons with welds oriented both longitudinally and transverse. Stee ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506077Recently, the promise of self-healing materials for enhanced autonomous durability has been introduced using a micro-encapsulation technique where a polymer based healing agent is encapsulated in thin walled spheres and embedded into a base polymer a ...http://www.ntis.gov/search/product.aspx?ABBR=N20090028603The goal of the CCT Program is to furnish the U.S. energy marketplace with a number of advanced, more efficient coal based technologies meeting strict environmental standards. These technologies will mitigate the economic and environmental impediment ...http://www.ntis.gov/search/product.aspx?ABBR=PB2010101830In this paper, several versions of extrusion processes were used to provide severe plastic deformation for grain refinement (with a modified ECAE extrusion) and for grain/fiber alignment (with straight extrusion). The process was performed at elevate ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506073In this paper, the effect of nanoparticles Al2O3 and Al3-X compounds (X = Ti, V, Zr) on the improvement of mechanical properties of aluminum alloys for elevated temperature applications is presented. These nanoparticles were selected based on their l ...http://www.ntis.gov/search/product.aspx?ABBR=N20090028687Study using photoelectron spectroscopy, inverse photoemission, and X-ray absorption and emission to derive the electronic structure of interfaces in CIGSS and CdTe thin-film solar cells. ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009964209The porosity in carbonaceous materials affects many of their properties. For this reason, the characterization of this porosity is very important. Many diverse techniques have been utilized to characterize the pores in carbon materials. Some of these ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506236The effective design of body armor requires the use of biomimicking materials that accurately and robustly reproduce the characteristic mechanical behavior of human tissues. The mechanical performance of the soft tissues is determined by their viscoe ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505788A multi-scale approach is used to construct a continuum strength model for vanadium. The model is formulated assuming plastic deformation by dislocation motion and strain hardening due to dislocation interactions. Dislocation density is adopted as th ...http://www.ntis.gov/search/product.aspx?ABBR=DE2009964080Modeling woven fabrics is challenging due to the need to capture the fabric response at both the macroscopic scale of the fabric and the 'mesoscale' of the yarns that compose the weave. Here, we utilize a continuum-level modeling technique for woven ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505706A zero-valent iron (ZVI) pilot treatability study was conducted for the treatment of chlorinated organics (primarily trichlorothylene) in groundwater at Operable Unit 20 at Naval Air Station North Island in 2006. From August 22, 2006 through Septembe ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506092The idea of performing creep tests on asphalt mixture beam specimens with the Bending Beam Rheometer (BBR) was investigated in this project. In the first part of the investigation a detailed beam preparation procedure was developed for both laborator ...http://www.ntis.gov/search/product.aspx?ABBR=PB2010101388In this paper we describe solutions to address critical challenges in direct fabrication of amorphous silicon thin film transistor (TFTs) arrays for high information content active matrix flexible displays for Army applications. For all flexible subs ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505769Doubly curved composite sandwich panels loaded by evenly distributed pressure were designed, analyzed, manufactured and tested. Quick and cost effective methods for making molds for vacuum infused doubly curved composites were studied and implemented ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506070An experimental technique is developed to impose a planar lateral confinement in a prismatic specimen (with rectangular cross-section); the setup enabled a controlled and homogeneous stress state with high lateral compressive stresses. A transparent ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505773Hybrid composite to metal bolted joints are the focus of much research due the inherent advantages that they present. In particular, they are very attractive to designers and engineers alike due to their simplicity and ease of disassembly. However, h ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506081While in space silicone based elastomer seals planned for use on NASA's Crew Exploration Vehicle (CEV) are exposed to threats from micrometeoroids and orbital debris (MMOD). An understanding of these threats is required to assess risks to the crew, t ...http://www.ntis.gov/search/product.aspx?ABBR=N20090029906Construction materials have, historically, not been capable of protecting users from toxic contaminants. For example, pipe materials sorb waterborne toxic contaminants, including chemical and biological (CB), toxic industrial chemicals (TICs) and tox ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506112Liquid resins used for molding composite structures a significant source of volatile organic compounds (VOC) and hazardous air pollutant (HAP) emissions. One method of reducing styrene emissions from vinyl ester (VE) resins is to replace some or all ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505758The objective of project NCHRP-100A was to develop a galvanic mesh anode for bridge deck application. The concept was to develop an expanded mesh or perforated sheet that would last at least 25 years, be durable for construction, not interfere with c ...http://www.ntis.gov/search/product.aspx?ABBR=PB2010101385A major objective of Army technology is the development of lighter and stronger platforms such as armored vehicles for Future Combat systems and Future Force. Here we show that carbon nanotubes could be the basis of such a possibility. It is shown fo ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505722The goal in this research is to accurately assess the fatigue life of hybrid composite/metal connections focusing upon bolted joints used in removable panels. Experimental testing was performed in flexure fatigue as part of this effort and is essenti ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506051Many different spacecraft materials were flown as part of the Materials on International Space Station Experiment (MISSE). MISSE was exposed to the low Earth orbital environment of atomic oxygen, ultraviolet radiation, thermal cycling, and hard vacuu ...http://www.ntis.gov/search/product.aspx?ABBR=N20090028678Molecular dynamics (MD) simulations using a first principles-based Embedded-atom-Method (EAM) potential are used to simulate the exothermic alloying reactions of a NiAl bilayer at 1500 K and 1100 K. Both microcanonical (NVE) and isoenthalpic (NPH) MD ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505723This slide presentation reviews the history and current practices of the Materials Engineering Branch (MEB) at the Goddard Space Flight Center. Included in the presentation is a review of the general Materials and Processes (M&P) requirements in the ...http://www.ntis.gov/search/product.aspx?ABBR=N20090027819Electrokinetic material fabrication techniques such as electrophoresis, electro-osmosis or ion transport, have been useful in constructing layered composites on electrically conductive substrates. These techniques have been widely used in producing, ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505708Reactive materials (RM) are a wide class of energetic materials with unique characteristics that can enable highly lethal munitions along with other applications. Most of the existing information on the behavior of these materials is phenomenological ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505720In 2006, the U.S. Geological Survey (USGS) initiated a study of the diverse and uncommon mineral resources associated with carbonatites and associated alkaline igneous rocks. Most of these deposit types have not been studied by the USGS during the la ...http://www.ntis.gov/search/product.aspx?ABBR=PB2010101886Studies of high-density binary mixtures of simple molecular solids have uncovered a new aspect of high pressure chemistry. In contrast 10 the many previous studies on relatively inert mixtures, here we show that high pressures can lead 10 unexpected ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505734This paper describes the development of a hot plate method capable of using air as a standard reference material for the steady-state measurement of the thermal conductivity of very small test samples having thermal conductivity on the order of air. ...http://www.ntis.gov/search/product.aspx?ABBR=N20090027866Modern analytical tools can yield invaluable results during materials characterization and failure analysis. Scanning electron microscopes (SEMs) provide significant analytical capabilities, including angstrom-level resolution. These systems can be e ...http://www.ntis.gov/search/product.aspx?ABBR=N20090028787Delayed interfacial scale failure takes place after cooling for samples of a Ni(Pt)Al-coated CMSX4 single crystal superalloy, cycled at 1150 C for up to 2000 hr. One sample exhibited premature coating grain boundary wrinkling, alumina scale spallatio ...http://www.ntis.gov/search/product.aspx?ABBR=N20090026575The U.S. Army has an interest in the use of alloys that produce excessive heat during formation and can be used for structural purposes such as shell casings. Molecular dynamics simulations have been used to provide a more thorough understanding of o ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505703High density is a critical acceptance criterion for armor ceramics. Quantifying the difference in density between what would be considered to be a 'good' or 'bad' region is complicated. As density is reduced from theoretical, does this infer the pres ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505772This slide presentation reviews the testing for Non-Volatile Residue contamination transferred to surfaces from handling and solvent cleaning. Included in the presentation is a list of the items tested, formal work instructions dealing with NVR. Ther ...http://www.ntis.gov/search/product.aspx?ABBR=N20090027844Off-line and On-line fatigue crack growth prediction of Aluminum 2024 compact-tension (CT) specimens under variable loading has been modeled, using multivariate Gaussian Process technique. The Gaussian Process model projects the input space to an out ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505600The formation of pyrophoric Fe-nanoparticles and foils from Fe(II)- oxalate and Fe-oxyhydroxide gel was investigated after thermal decomposition and reduction under H2 atmosphere. The Fe(II)-oxalate was synthesized by a controlled nucleation process ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505824Reinforced concrete (RC) is the major construction material for hardened structures for the Army. As a basis for shelters and for infrastructure reinforced concrete has two drawbacks: the bond between the concrete and its steel reinforcement at the i ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505727Materials that can recover mechanical properties following failure offer increased safety and service life. Moreover, successful development of such systems would reduce factors of safety required in design thus reducing weight. Two approaches for he ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505825Research efforts to develop high density refractory metals, such as Ta and W, have to a certain extent been hindered by the inability to thermomechanically process the materials to achieve key properties necessary for adequate performance, namely con ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505672Single-walled carbon nanotubes (CNTs) have been studied extensively since their discovery and identification by Iijima in 1993. Their impressive mechanical, electrical, and thermal properties have created new fields of study, and the benefits of this ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505707Higher toughness in steels permits the presence of longer fatigue cracks prior to rupture making it less likely that they would escape detection. Since steels become brittle at cryogenic temperatures, a steel with higher fracture toughness at low tem ...http://www.ntis.gov/search/product.aspx?ABBR=PB2010101960Ammunition is often exposed to extreme temperatures and solar radiation during transport, storage and pre-positioning. This is of particular concern in the present theater of operations. There have been documented incidents of failures caused by ther ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505782Considering the interest in and challenges of using ceramic matrix composites, a full understanding of the physical properties is needed to continue to move the technology forward. A property of interest to the design process is the through thickness ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505960The wide applicability of non-wetting materials has generated a surge in commerical, military, and academic materials research. Previous studies have elucidated three parameters useful in the development of non- wetting surfaces: chemical functionali ...http://www.ntis.gov/search/product.aspx?ABBR=ADA506239Self-assembly opens new possibilities in three-dimensional (3-D) device structures, and here we report on our progress toward a self-assembling 3-D circuit. A major challenge to such a system has been the fabrication of large numbers of free-standing ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505770Transmission electron microscopy revealed b-nanoparticles of 25 to 100 micrometers. The hexagonal network and cluster of these particles are also obtained at higher magnification. Raman spectral analyses of bnanoparticles confirmed the spectral peaks ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505553Fibers incorporated into polymer matrices suffer from poor adhesion at the fiber-resin interface. In ballistic materials such as body armor, it is imperative that the fiber-resin interface is strengthened for superior energy absorbing capabilities. T ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505762The initial work statement targeted quantifying the hot working conditions experienced by titanium during friction stir welding/processing (FSW/P). Of particular interest was the identification of the hot working conditions (i.e. strain rate, strain, ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505613In general, it has long been known that the hardness of ceramics correlates with gross impact performance, however, not to a degree useful for materials development. Wilkins, Cline and Honodel, 1969, were the first to point out the apparent importanc ...http://www.ntis.gov/search/product.aspx?ABBR=ADA505731