CZ Composition Analysis

The configuration of a segment or structure regularly solicits to minimize the possibility of failure. The failure of metals is a complex subject which must be managed crack or other significant sensation. Here I will discuss the designing error/material selection/inappropriate uses of the historical disaster of the “Titanic” . Design Faults: Alongside the material failures, poor design of the watertight compartments in the Titanic's lower area was a variable in the debacle.

Ceramics Engineering-- the industry that Materials Technology Corporation, or "MTC" is a part of-- is a multi-billion dollar a year industry. Because ceramics can be manufactured to have unique combinations of strength, weight, thermal and magnetic conductivity, and deformability, they have countless uses in industries such as aerospace, biomedical, automotive, and electrical. With an unlimited number of such combinations, it is possible to create a material that exactly suits a given situation.

In the specimens, all showed a brittle fracture due to how the stress vs strain slope looked and where the Ultimate Tensile Strength was located. Also, how the composited specimens failed look consistent that there were any defects in the specimens. The 0°/90° carbon/epoxy specimen failed in the longitudinal direction because of how the fibers were aligned in that direction. The two ±45° glass/ epoxy specimen failed in the 45-degree direction do to how the fibers were aligned in the specimens. These failures would make sense because composites fail when fiber become unconnected so the epoxy failed first and then cause the fibers to fail next. The fibers individual are weak but when are combined and form a pattern with other fibers is how the strength

After the explosion, the metal is often highly deformed has to be heated to soften it or through a series of rollers depending on the metal

Sample 3 achieved a higher Rockwell C rating than its initial "As Received" hardness with every type of quench.. Whereas samples 1, 2, and 4 softened during the annealing process but increased in hardness with the other quenching medias.

With the strain rate constant it can be seen that different temperatures do not affect the stress-strain curve of the nanocomposite. As in the section 2.3.1 we define a parameter for the temperature sensitivity as:

The purpose of this experiment was to observe the different kind of crystal package arrangements that each material experienced after an impact load. For this reason, a varying range of temperatures were used during the experiment. As a result, comparing the effects that temperatures had on the types of fractures each material experimented.

1) Of all the sample materials tested during the lab, the AISI-1020 Cold Rolled Steel was found to be the strongest. Moreover, between the two samples of AISI-1020 Cold Rolled steel, the sample without the neck was found to be stronger. This was observed by calculating the ultimate tensile strength for all the samples used during the experiment. As a result, the higher the ultimate tensile stress the material endured, the stronger the material was. The ultimate tensile stress calculated for the AISI-1020 Cold Rolled was 563 MPa which was the highest of all. Therefore, concluding that the AISI-1020 Cold Rolled without a neck region was the strongest material.

According to other sources, the demand can grow up to 8.4% annually just for nylon alone. Since 2006 new and expanding uses of nylon-6 resins include wire and cable coating, hardware & furniture accessories, and electrical parts (7). According to the Journal of Molecular Structure, significant research has been conducted on a new CL-20/Caprolactam co-crystal. Overall co-crystallization is an effective way to improve both physical and chemical properties of a crystalline solid. In this particular study, co-crystallization has been found to be an effective way to improve performance in high explosive 2,4,6,8,10,12-hexanitrohexaazaisowurtitane (CL-20). This particular co-crystallization effort will be beneficial in altering the density, melting point, and sensitivity of explosives. Due to its low sensitivity, the CL-20/Caprolactam co-crystal is planned to be used as a desensitizer in other high

The use of energetic materials has been increasing as the years go on. Azo-Tetrazolate belongs to high nitrogen content high-density energy materials (HNC, HEDMs). The norm for (HNC, HDEMs) is that they have good thermal stability, impact and shock insensitivity, good performance and the possibility for the formation of less smoke or soot. This seems nearly impossible, as having good thermal stability and impact insensitivity usually results in low explosive performance. The need for a good mix of all three qualities has resulted in growing interest in high-energy density materials, high nitrogen content (HEDMs, HNC). Azo-Tetrazolate and its derivatives are the most recent developments in this field. They come in the form of salts with high nitrogen content and high (positive) heats of formation. These salts have exhibited both good insensitivity to friction, shock, and electrostatic discharge while having a good performance value. The nonmetallic salts of 5,5′-azotetrazolate include Guanidinium Azo-Tetrazolate (GAT), Aminoguanidinium Azo-Tetrazolate (AGAT), Diaminoguanidinium Azo-Tetrazolate (DAGAT), Triaminoguanidinium Azo-Tetrazolate (TAGAT), and Ammonium Azo-Tetrazolate

The building materials available to engineers today are vastly improved over those of the past. One class which has seen wide spread usage in many fields are composites. These new materials first appeared on the aerospace scene in the early 1970’s, for these materials were found to provide many benefits over the previous metal-based designs.

This paper discusses the different properties of composite materials under static testing condition to determine the effect of aging due to change in temperature and moisture content. Effects on tensile, shear, impact, stiffness and fatigue parameters are studied. For each property, application specific composite materials are taken into consideration with different stacking sequence and number of plies. Different samples of these are then introduced to different hygrothermal environments for example: temperatures ranging from -50 degree Celsius to +50 degree Celsius or kept in wet conditions for 24 hours at different temperatures of 21, 37 and 50 degree Celsius etc. Different tests are performed based on the material property to observe a change from the initial unaged specimen. To study every property a different test method is discussed. A final comparison for each property between the unaged and aged specimen is shown in order to see the property’s dependence on temperature and moisture. This comparison highlights the temperature and moisture dependent properties and showcase a trend. Properties like tensile modulus, shear modulus, shear strength, flexural stiffness and fatigue life show a decrease with increase in temperature and moisture content while Poisson’s ratio and impact strength increase with increase in temperature and moisture content.

Principal Investigator Dr. Roy Xu (US citizen) worked as an aerospace structural engineer in China. He came to the US and received his Ph.D. in Aeronautics and Materials Science from California Institute of Technology in 2002. He started his interdisciplinary faculty career as a civil engineering faculty at Vanderbilt University, and a mechanical and aerospace engineering faculty at University of Texas at El Paso and New Mexico State University (NMSU). His honor and award include an Office of Naval Research (ONR) Young Investigator Award in 2003, and a Fellow of the American Society of Mechanical Engineers (ASME) in 2012. He is the Chair of the ASME Fracture and Failure Mechanics Technical Committee. As an author of 46 journal papers,

The dominance of {112} slip at yield followed by {110} slip for the rest of deformation appears to comply with the theory of Seeger et al. [48, 85], which suggests that the high purity screw dislocation core relaxation is on {112} planes, and impurities change the core relaxation to {110} planes. This indicates that the total

Semisolid processing originates with the research at MIT on the viscosity behavior of tin/lead alloys during solidification, published by Spencer,Mehrabian, and Flemings in 1972.The original purpose was to examine the shear stress of semisolid structures with a view to shedding light on hot tearing mechanisms in solidifying alloys, but it was discovered that the process of shearing clearly altered the microstructure, changing the dendritic morphology of the solid into more spherical form that brought about a dramatic fall in shear stress and viscosity. This is of course the phenomenon of “Thixotropy,” well known to ceramicists and polymer scientists, but until then not observed in metallic systems. This discovery at MIT initiated an in-depth study of thixotropy in alloys, and the awareness that stirred semisolid alloys could be injected as in die casting into molds with certain advantages: The controlled higher viscosity flow meant that less air