Monitoring the Effect of Recrystallization and  Quenching in AlMgx Alloy by Pat

A. ASHOUR

Article Details

Monitoring the Effect of Recrystallization and Quenching in AlMgx Alloy by Pat

Authors:

A. ASHOUR

Publisher:

TUBITAK

Journal:

Turkish Journal of Physics 2002 Vol.26 Issue 6, pp.453-458

Document Type:

Article

Publication Date:

5/2002

Document Language:

Turkish

Document ID (Org No.):

2000762057

Frequency:

Bimonthly

eISSN:

1303-6122

pISSN:

1300-0101

Keywords:

Isothermal and Isochronal annealing; Deformation; Grain size; Quenching; Recrystallization.

Abstract:

 

Positron annihilation technique (PAT) lifetime measurements have been  carried out on AlMgx samples (x = 0.23, 0.85, 1.27 and 1.4 at %)  with point defects and dislocations introduced by plastic deformation  at room temperature.  Clustering of vacancies was observed by  quenching using PAT. The samples were annealed at 573 K for 12 hours  to homogenize and divided into two sets.  The first set of AlMgx  (x = 0.23, 0.85 and 1.4 at %) was deformed to 10, 25 and 35%  thickness reduction.  Isochronal annealing was studied in the range of  300-550 K. In the second set of measurements, AlMgx (x = 1.27 Mg  at %) was deformed to 31.25% thickknes reduction.  Variation in the  mean lifetime with annealing time (Isothermal annealing at 323 K) was  studied.  On the other hand, the effect of the degree of deformation  on change of the value of the mean lifetime with different  concentration of Mg was studied.  This work is able to distinguish the  state of sample with different concentration of impurities.  The  deformed samples reach the bulk state at higher temperature.  Grain  growth occurred with increasing temperatures as shown by lifetime  value.  The effect of quenching from various temperatures range  (373-823 K) was studied.

 

Positron annihilation technique (PAT) lifetime measurements have been  carried out on AlMgx samples (x = 0.23, 0.85, 1.27 and 1.4 at %)  with point defects and dislocations introduced by plastic deformation  at room temperature.  Clustering of vacancies was observed by  quenching using PAT. The samples were annealed at 573 K for 12 hours  to homogenize and divided into two sets.  The first set of AlMgx  (x = 0.23, 0.85 and 1.4 at %) was deformed to 10, 25 and 35%  thickness reduction.  Isochronal annealing was studied in the range of  300-550 K. In the second set of measurements, AlMgx (x = 1.27 Mg  at %) was deformed to 31.25% thickknes reduction.  Variation in the  mean lifetime with annealing time (Isothermal annealing at 323 K) was  studied.  On the other hand, the effect of the degree of deformation  on change of the value of the mean lifetime with different  concentration of Mg was studied.  This work is able to distinguish the  state of sample with different concentration of impurities.  The  deformed samples reach the bulk state at higher temperature.  Grain  growth occurred with increasing temperatures as shown by lifetime  value.  The effect of quenching from various temperatures range  (373-823 K) was studied.

Article Details

Monitoring the Effect of Recrystallization and Quenching in AlMgx Alloy by Pat

Authors: A. ASHOUR

Publisher: TUBITAK

Journal: Turkish Journal of Physics 2002 Vol.26 Issue 6, pp.453-458

Document Type: Article

Publication Date: 5/2002

Document Language: Turkish

Document ID (Org No.): 2000762057

Frequency: Bimonthly

eISSN: 1303-6122

pISSN: 1300-0101

Isothermal and Isochronal annealing; Deformation; Grain size; Quenching; Recrystallization.

Issues

Authors:

A. ASHOUR

Publisher:

TUBITAK

Journal:

Turkish Journal of Physics 2002 Vol.26 Issue 6, pp.453-458

Document Type:

Article

Publication Date:

5/2002

Document Language:

Turkish

Document ID (Org No.):

2000762057

Frequency:

Bimonthly

eISSN:

1303-6122

pISSN:

1300-0101