問題一覧
1
Metals which contain iron is
ferrous metals
2
The carbon content in medium carbon steel is
0.3-0.8 %
3
A steel with 1.3 % carbon content is
a high carbon steel
4
Pearlite is a laminate microstructure of steel consisting of
ferrite and cementite.
5
Cementite is
Strong but hard and brittle.
6
Grinding of a steel reveals a dull but spark pattern (lots of forking)
It is likely to be high carbon steel
7
Plasticity
is the opposite to elasticity
8
Toughness is the opposite of
brittleness
9
is the ability to resist off-set (scissor action) loads
Shear strength
10
An Impact Test measures
toughness
11
The Charpy and Izod tests are types of
impact tests
12
The brinell hardness testers uses
a steel ball indenter
13
the effects of annealing steel
decrease in internal stress ,softening of the metal
14
Steel annealing process it
relieves internal stress suffered after engineering processes
15
Fatigue tests can be carried out
either on individual components or on complete aircraft structure
16
Case hardening is
heat-treating process of metal produces a hard, wear-resistant surface over a strong, tough core
17
Thermal conductivity
ability of a material to conduct a certain amount of heat within a given time, copper is a good example.
18
Normalizing heat treating
Iron- base metals
19
Nitriding of steel by
ammonia gas
20
the aluminum will have
a lower VPN than the steel
21
At normal temperature High Carbon Steel is harder because
of the percentage of carbon in the granules
22
a material to fracture when subjected to a shock loading or blow
a brittleness.