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-trim tabs, Trim tabs are small flaps attached to the rear o...

Trim tabs are small flaps attached to the rear of the main control surfaces. They can be adjusted the pilot to reduce the force required to hold the control surface in its deflecte

Functional checks of chemical de-icing systems, FUNCTIONAL CHECKS OF CHEMIC...

FUNCTIONAL CHECKS OF CHEMICAL DE-ICING SYSTEMS: Once the correct flow rate of the fluid supply has been established the distribution of the fluid flow over the blades should be

Unidirectional fabric, Unidirectional Fabric A unidirectional (UD) ply ...

Unidirectional Fabric A unidirectional (UD) ply is one in which all of the fibres run in one direction only. A small amount of fibre or other material may run in other directio

Water, Dear Sir, Please answer the follwing question . Specs: Filterati...

Dear Sir, Please answer the follwing question . Specs: Filteration Capacity 18000 LPH , Tested pressure 6Kg/Sq.cm, Vertical MS pressure Sand filter(flat ends 6mm thick & di

Query about Finite Element Analysis assignment service , Hi, I require a s...

Hi, I require a service which involves finite element modelling on commercial software package "ABAQUS". I am personally not sure how to model this on ABAQUS and thats why I have

Carrer, i want to do aeronautics engg. but my height is only five feet . so...

i want to do aeronautics engg. but my height is only five feet . so can i go in aeronautics

Basic instrumentation system, A basic instrumentation system consists of a ...

A basic instrumentation system consists of a transducer, conditioning amplifier, and analog digital converter connected (in general) by analog and digital transmission lines.

Propeller shafts, PROPELLER SHAFTS Most modern engines, both reciprocat...

PROPELLER SHAFTS Most modern engines, both reciprocating and turbine, have flanged propeller shafts. Some of these flanges have integral internally threaded bushings that fit

Spreading function and scattering function, In a CDMA system, the signal is...

In a CDMA system, the signal is spread over a large bandwidth by multiplying the transmitted symbol by a sequence of short pulses, also called chips. The system bandwidth is thus d

Engineering seminar, Hey ,How are you? I need help in another class , its 1...

Hey ,How are you? I need help in another class , its 1 credit class ( Engineering seminar ), how to choose s.d in this class , , ,so we want describing our project which is ( radi

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