User Account

All Pages

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

Crystallographic notation, Q. W hat do you understand by crystallographic n...

Q. W hat do you understand by crystallographic notation of atomic planes/Explain with the help of examples. Ans.Crystallographic Notation 1. Crystal Symmetry:

Engine vibration indication, Engine Vibration Indication The engine vib...

Engine Vibration Indication The engine vibration monitoring (EVM) system shows the out of balance force for the N1 and N2 shaft. High engine vibration shows engine damage or

Measurement of thermocouple voltage, Measurement of thermocouple voltage ...

Measurement of thermocouple voltage The voltage is typically only a few millivolts and should be measured using a high impedance system. If an amplifier is used, must also have

Passive clearance control system - aircraft engine, Passive clearance contr...

Passive clearance control system : Compressor discharge air and HP compressor air provide cooling airflow to protect the turbine casing against rapid temperature changes. Th

Logic gate - not gate, THE INVERTER ('NOT' GATE) Figure shows the symbo...

THE INVERTER ('NOT' GATE) Figure shows the symbol for an inverter, where the output will produce the complement of the input. This device is often employed when the complement

Aeroengine - linear blade cascade, A blade cascade is a row of evenly space...

A blade cascade is a row of evenly space yp dentical blades. Approximates to a turbomachinery rotor or stator if the radius the annulus is large compared with the bl the annulus is

Cell arrays matlab, Expertsmind.com offers  Cell Arrays matlab assignment ...

Expertsmind.com offers  Cell Arrays matlab assignment help In matlab, Cell arrays are just like frequent arrays in that they are "indexed" details of information, with an out

Heat transfer, A heat recovery device involves transferring energy from hot...

A heat recovery device involves transferring energy from hot flue gases passing counter currently through an annular region to pressurized water flowing through the inner tube of t

Mining, Students are to undertake a tunnel blast design for the following c...

Students are to undertake a tunnel blast design for the following conditions: • Tunnel is 5.5m wide by 5.5.m high • Rock is a granite with a UCS of 300 MPa • Drill hole diameter is

Pitch control unit (pcu) operation - propellers, Pitch control unit (pcu) o...

Pitch control unit (pcu) operation: The action of the Governor bob weights, due to the varying RPM of the engine, is to raise or lower an internal piston to cover or open fluid

Write Your Message!

Captcha
Order Assignment

Featured Services

Order Now

Popular Subjects

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!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +91-977-207-8620

Phone: +91-977-207-8620

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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