ENGINEERING SCIENCE, Other Engineering

Assignment Help:
QUESTION 7
As a forensic materials expert – you have been asked to identify a metallic powder found on the clothing of someone suspected of fabricating an incendiary device used in an armed robbery.
The suspect suggests that the powder is tungsten – which he uses a lot in his line of work. The police believe that the powder is part of a chromium/silver/nickel mixture often used in such devices. Armed with the following information from an X-ray powder diffraction analysis – what can you conclude?
Using Cu ka radiation of 0.1542nm, three large diffraction peaks were observed at 44.4°, 64.6° and 81.7°.

QUESTION 9 – Crystallographic transformation
On cooling from the molten state, titanium solidifies into a BCC lattice structure. However, on cooling to below 880°C, a change occurs whereby the crystal structure transforms into an HCP structure. Assuming the number of atoms remains constant and that the lattice parameters are as shown below, calculate the volume change associated with this transformation.
For the BCC lattice: a = 3.32Å
For the HCP lattice: a = 2.956 Å and c = 4.683 Å
Titanium is a commonly used metal in engineering structures. Explain why your findings above should be cause for concern if these engineering structures are to be used at high temperatures.

Related Discussions:- ENGINEERING SCIENCE

Flight dynamics - velocity component, Force, Moment, Velocity and Angular V...

Force, Moment, Velocity and Angular Velocity Components • Aerodynamic Force Components - X, Y, Z • Velocity Components - U, V, W (or Vx, Vy, Vx) • Angular Velocity Components - P,

Chemical engineering, A steel cylinder 10 cm in diameter and 10 cm long is ...

A steel cylinder 10 cm in diameter and 10 cm long is initially at 300 0C. it is immersed in an oil bath which is maintained at 40 0C, with h= 280 W/m2. 0C. Find the temperature at

Sprinkler system - fire protection engineering, Sprinkler system - fire pro...

Sprinkler system - fire protection engineering Sprinkler systems may be installed in a building to achieve a number of different objectives.  Very often the primary reason for

Thrust indication - aircraft engine, Thrust indication: Although rpm ga...

Thrust indication: Although rpm gauges give an indication of the rotational speed of the compressor, they do have one drawback. They do not normally indicate the thrust output

Case analysis, Construct the pro forma cash flow statements for Bloomington...

Construct the pro forma cash flow statements for Bloomington Clinics for five years into the future using the data given in the case plus the most likely growth estimates. a. Wha

Corrosion cracking, offer an explanation for why cracking might have occurr...

offer an explanation for why cracking might have occurred. Give at least three suggestion on how to prevent this type of corrosion. You may supple with appropriate figures

Corporate Governance, What is the status of corporate governance in UAE?

What is the status of corporate governance in UAE?

Match plate patterns, Match plate patterns are used where a rapid producti...

Match plate patterns are used where a rapid production of small and accurate castings is desired on a large scale. These patterns find a great favour in machine moulding. Their co

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd