Material

Purity

Reference

Obstacle 1

Obstacle 2

Data

Analysis

${\widehat{\sigma }}_i/{\mu }_o$

g_o1

${\widehat{\sigma }}_2/{\mu }_o$

g_o2

Iron

200 ppm C

[27]

[8]

0.0193

0.096

0.0046

0.4

Niobium

0.9984

[9]

[8]

0.032

0.10

0.0057

0.37

Vanadium

0.9986

[28]

[8]

0.013

0.10

0.0020

1.0

Tantalum

0.999

[29]

[8]

0.0145

0.081

0.0048

0.40

Molybdenum

0.9996

[9]

[8]

0.0108

0.07

0.0030

0.27

Tungsten

0.9999

[30] [31]

[8]

0.0017

0.105

0.0036

0.7

AISI 1018 Steel

~0.99;

1800 ppm C

[32]

[2] (T 9.11)

0.014

0.11

0.0050

1.0

p_i1 = p_i2 = 0.5; q_i1 = q_i2 = 1.5

${\dot{\epsilon }}_{o1}$ = 10⁸ s⁻¹

${\dot{\epsilon }}_{o2}$ = 10¹⁰ s⁻¹