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

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

Dsp, Dit fft idft

Dit fft idft

Numerical method, find the newton raphson iterative formula for a reciproca...

find the newton raphson iterative formula for a reciprocal of a number N and hence find the value of 1/23.correct to 5 place of decimal

The operational amplifier , The operational amplifier : The integrated ...

The operational amplifier : The integrated circuit operational amplifier is one of the most useful and versatile electronic devices available today.  The name 'operational ampl

Spinning reticle seekers , Spinning Reticle Seekers  A spinning reti...

Spinning Reticle Seekers  A spinning reticle seeker contains a single thermal detector and a spinning patterned disk - such as the ‘Rising Sun' Reticle.   - consis

Regarding my project, i want to do project in the area wing in aircraft...p...

i want to do project in the area wing in aircraft...please give some sugestions or ideas in that

Finance help, After five years, what is Judy’s total income (interest par) ...

After five years, what is Judy’s total income (interest par) from each bond? Should she use this total as a way of deciding which bond to purchase?

Class number arrangement - library management, Class Number Arrangement   ...

Class Number Arrangement   Unlike the Cities Numbers of Dewey Decimal Classification the Colon Class Numbers have not only Arabic Numerals but also capital letters of the Roman

Rubber, What is smoked rubber

What is smoked rubber

Fire protection project, the requirements are 1- prescriptive analysis of o...

the requirements are 1- prescriptive analysis of occupancy through prescriptive code analysis with in- depth information related to the egress.2- fire scenario design realistic and

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: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

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