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Q
General coarseness of the microstructure (Melt) is largely determined by the _______
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1
Views
777
Nguyễn Thị Thuý
N
N
Wire diameters in the Gas metal arc welding ranges from _______
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1
Views
293
Hưng Thịnh
H
L
How much impact does a nucleation barrier can create to the solidification when melt has approximately the same composition as the base
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1
Views
317
Võ Kiều
V
N
Which among the following is the first automated arc welding process?
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1
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488
Nguyễn Thanh Uyên
N
P
Calculate the heat density if the power transferred is 1000W and the corresponding surface area is 10m$^{2}$?
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1
Views
433
Nguyễn Cap Tuyến
Nguyễn Cap Tuyến
N
In general dendritic and cellular substructures in welds tend to be on a finer scale than in casting.
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1
Views
438
Phạm Công Thành
P
P
Plasma arc welding is a special form of ____
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1
Views
208
Ngô Thị Vân
N
P
Typical shielding gases in TIG welding includes ______
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1
Views
355
Phác Chí Huấn
P
Đ
Welding can be considered as a ______
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1
Views
197
Nguyễn Nguyệt Ánh
Nguyễn Nguyệt Ánh
D
TIG welding of thin plates will give steeper thermal gradients than submerged arc welding of thick plates, the latter process will have
Answers
1
Views
205
Bờm
B
L
An important effect of increasing the welding speed is that the shape of the weld pool changes from an elliptical shape to a ___________
Answers
1
Views
225
Khánh Đoan
K
N
The breakdown of solid/liquid interface at the local equilibrium can be due to___
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1
Views
503
Sheeshy Sipgrark
S
Đ
It is seen that for crystal growth rate, R, to keep pace with the welding speed, 3m/s, the condition must be met that for this to happen
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1
Views
417
Đạt Michio
Đ
N
Which among the following solidification can occur without microsegregation?
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1
Views
332
Nguyễn Thiệu Vy
N
D
Solidification can also occur at much higher rates of 10$^{4}$-10$^{7}$K/s. In which among the following it is not applicable?
Answers
1
Views
289
Nguyễn Cap Tuyến
Nguyễn Cap Tuyến
D
What happens to the entropy in a system with constant volume and constant internal energy during a spontaneous process?
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1
Views
207
Linh Chi
L
N
Two crystal structures are in equilibrium and their Gibbs energies are the same. Thus, the driving force for the transformation is_________
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1
Views
333
Quang Hiếu
Q
N
The quantum of energy in an elastic wave is called a ___________
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1
Views
236
Lâm Phung
L
T
Graphite and diamond at room temperature and pressure are examples of _____________
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1
Views
175
Mỹ An
M
Đ
When the system is at local equilibrium, its Gibbs free energy (G) function has reached its minimum value.
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1
Views
226
Nguyễn Thuỳ Chi
N
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