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Table 4 Knoop indentations on {011} and {110} faces: Comparison of observed slip traces and extent of twinning with the ERSS calculations for (001) [100] and (101) \( \left[10\overline{1}\right] \) systems

From: Mechanical properties of β-HMX

  

ERSS

  

Crystal Face

Orientation (°)

(001) [100] A

(101) \( \left[10\overline{1}\right] \) B

Observed slip traces

Twinning

{011}

0 [100]

0.0043

0.0775

B

Very little

 

31

0.0533

0.0956

B

Very little

 

90

0.3261

0.2336

A

Some

 

122

0.1767

0.1140

A

Some

{110}

0 [001]

0.0677

0.0533

B

Very little

 

65

0.2443

0.1890

B

Rel. extensive

 

90

0.3091

0.2215

B

Rel. extensive