Archive: 2008 - Moldavian Journal of the Physical Sciences

05 Feb 2008

2008
V. 7
1
(p.64 - 71)

Influence of rest on mechanical properties of GaP single crystals deformed by scleroscopic method at different temperatures

Authors:

Jitaru, Raisa; Rahvalov, Veaceslav

Summary:

The areas of the GaP (111) plane placed between the scratches parallel to [110] have been investigated. The deformation degree of these areas was varied by distance between scratches (60-180 µm) and scratching temperature (T = 20, 150, and 450°C). It was obtained that the microhardness value (H) is smaller and the acoustic emission (AE) is more intensive for the areas with higher stress state. It was established that rest (~500 h) resulted in the AE significant increase for complete cycle of microindentation and emission in unloading. It was shown that the active formation of cracks and, especially, a material break off around the indents under microindentation of the investigated GaP zones have been observed while the AE increase; however, the H value in this case changed weakly. Obviously, after rest the revealed deformation acts differently influence the AE and microhardness changes. The essential changes of the relaxation coefficient (K) dependence on deformation degree as a result of rest have been revealed: K linearly increases with deformation degree increase before rest and monotonically decreases after rest.

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<meta name="citation_title" content="Influence of rest on mechanical properties of GaP single crystals deformed by scleroscopic method at different temperatures ">
<meta name="citation_author" content="Jitaru, Raisa">
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scratches (60-180 µm) and scratching temperature (T = 20, 150, and 450°C). It was obtained 
that the microhardness value (H) is smaller and the acoustic emission (AE) is more intensive 
for the areas with higher stress state. It was established that rest (~500 h) resulted in the AE 
significant increase for complete cycle of microindentation and emission in unloading. It was 
shown that the active formation of cracks and, especially, a material break off around the indents under microindentation of the investigated GaP zones have been observed while the AE 
increase; however, the H value in this case changed weakly. Obviously, after rest the revealed 
deformation acts differently influence the AE and microhardness changes. The essential 
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BibTeX

@article{ibn_3783,
author = {Jitaru, R.P. and Rahvalov, V.},
title = {Influence of rest on mechanical properties of GaP single crystals deformed by scleroscopic method at different temperatures },
journal = {Moldavian Journal of the Physical Sciences},
year = {2008},
volume = {7 (1)},
pages = {64-71},
month = {Feb},
abstract = {(EN) The areas of the GaP (111) plane placed between the scratches parallel to [110] have 

been investigated. The deformation degree of these areas was varied by distance between 
scratches (60-180 µm) and scratching temperature (T = 20, 150, and 450°C). It was obtained 
that the microhardness value (H) is smaller and the acoustic emission (AE) is more intensive 
for the areas with higher stress state. It was established that rest (~500 h) resulted in the AE 
significant increase for complete cycle of microindentation and emission in unloading. It was 
shown that the active formation of cracks and, especially, a material break off around the indents under microindentation of the investigated GaP zones have been observed while the AE 
increase; however, the H value in this case changed weakly. Obviously, after rest the revealed 
deformation acts differently influence the AE and microhardness changes. The essential 
changes of the relaxation coefficient (K) dependence on deformation degree as a result of rest 
have been revealed: K linearly increases with deformation degree increase before rest and 
monotonically decreases after rest.  
  },
url = {https://ibn.idsi.md/vizualizare_articol/3783},
}

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scratches (60-180 µm) and scratching temperature (T = 20, 150, and 450°C). It was obtained 
that the microhardness value (H) is smaller and the acoustic emission (AE) is more intensive 
for the areas with higher stress state. It was established that rest (~500 h) resulted in the AE 
significant increase for complete cycle of microindentation and emission in unloading. It was 
shown that the active formation of cracks and, especially, a material break off around the indents under microindentation of the investigated GaP zones have been observed while the AE 
increase; however, the H value in this case changed weakly. Obviously, after rest the revealed 
deformation acts differently influence the AE and microhardness changes. The essential 
changes of the relaxation coefficient (K) dependence on deformation degree as a result of rest 
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<dc:description xml:lang='en'>The areas of the GaP (111) plane placed between the scratches parallel to [110] have 

been investigated. The deformation degree of these areas was varied by distance between 
scratches (60-180 µm) and scratching temperature (T = 20, 150, and 450°C). It was obtained 
that the microhardness value (H) is smaller and the acoustic emission (AE) is more intensive 
for the areas with higher stress state. It was established that rest (~500 h) resulted in the AE 
significant increase for complete cycle of microindentation and emission in unloading. It was 
shown that the active formation of cracks and, especially, a material break off around the indents under microindentation of the investigated GaP zones have been observed while the AE 
increase; however, the H value in this case changed weakly. Obviously, after rest the revealed 
deformation acts differently influence the AE and microhardness changes. The essential 
changes of the relaxation coefficient (K) dependence on deformation degree as a result of rest 
have been revealed: K linearly increases with deformation degree increase before rest and 
monotonically decreases after rest.  
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<dc:source>Moldavian Journal of the Physical Sciences 7 (1) 64-71</dc:source>
<dc:title>Influence of rest on mechanical properties of GaP single crystals deformed by scleroscopic method at different temperatures </dc:title>
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“ ... ”

SM ISO690:2012

JITARU, Raisa; RAHVALOV, Veaceslav. Influence of rest on mechanical properties of GaP single crystals deformed by scleroscopic method at different temperatures . In: Moldavian Journal of the Physical Sciences. 2008, nr. 1(7), pp. 64-71. ISSN 1810-648X.