Lecture 1A - Laser vs EBM PBF Flashcards
1
Q
laser cooling rate
A
10^5-10^7 K/s
2
Q
laser environment
A
Ar
3
Q
laser spattering
A
spattering with denudation zone
4
Q
laser temp gradient
A
larger T gradient w/ high residual stress
5
Q
laser preheating
A
no preheating
6
Q
laser impurities
A
more impurities
7
Q
laser beam size
A
30-200 μm
8
Q
laser limitation
A
absorptivity limited
9
Q
laser production rate
A
slower
10
Q
laser application
A
many metals
11
Q
eb cooling rate
A
10^3 - 10^4 K/s
12
Q
eb environment
A
vacuum with trace He
13
Q
eb spattering
A
little to no spattering
14
Q
eb temp gradient
A
less temp gradient (low residual stress)
15
Q
eb preheating
A
required to sinter the powder
