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

Cells, what are the advantage of lithium cell

what are the advantage of lithium cell

Vehicle kinematics, x(t)=integration((Vx(t)+Vy(t))/2*cos(theta)dt) where Vx...

x(t)=integration((Vx(t)+Vy(t))/2*cos(theta)dt) where Vx, Vy and theta is a function of t I am getting problem with how to write it down in matlab in order to get the position x.

Principal of assembly buildings- fire protection engineering, Principal of ...

Principal of Assembly buildings- fire protection engineering: As assembly buildings accommodate members of the public they often accommodate people with disabilities. People

Tvm, hOW LONG WILL IT TAKE AN AMOUNT TO DOUBLE IF THE INTEREST RATE IS 7% P...

hOW LONG WILL IT TAKE AN AMOUNT TO DOUBLE IF THE INTEREST RATE IS 7% P.A. COMPOUNDED ANNUALLY

Riveting, Riveting  is a fixed fastening procedure in which the end of the ...

Riveting  is a fixed fastening procedure in which the end of the metal pin is pressed over or spread out by hammering operation. Wrought iron and steel are used for the riveting an

Calculate the relative load of mobile broadband subscribers, Question: ...

Question: (a) A mobile operator wants to weigh and allocate cost towards mobile broadband subscribers with mobile broadband at 80% of the traffic and 15% of the subscribers. H

Propeller spinners, PROPELLER SPINNERS All modern propeller-driven aero...

PROPELLER SPINNERS All modern propeller-driven aeroplanes have spinners over their propeller hubs. These spinners have the dual aerodynamic function of streamlining the engine

Radar engineering, Calculate the maximum range when radar operates at 10GHz...

Calculate the maximum range when radar operates at 10GHz and has peak power=10 Mwatt,S/N ratio=10dB,antenna cross section=100 mm2,target cross section=10mm2.The gain of transmittin

Construction, What are the problems arises during construction and their so...

What are the problems arises during construction and their solutions

FOCP, THE USER INTERFACE

THE USER INTERFACE

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