Is there any possibility to form glassy phases in Al-Cu-Mg system with Al as a major element ?
What are the expected proper ratio to form them for fast cooling conditions?
Are there any works about that, please share
Thank you
Cooled fast enough any material can be obtained in a glassy phase. There are certain criteria available in the literature which act a guide to select components and composition to obtain an alloy in an amorphous state by common lab scale cooling conditions like with a cooling rate from the liquid less than 1000 K/sec. There are books and numerous research papers available that can provide all the necessary information.
Dear Sadeem Fadhil,
In forming metallic glasses, the kinetics compete with the thermodynamics of the liquid/solid transformation. Although from a theoretical point of view Syed Zameer Abbas may be right in stating that any material can be obtained in a glassy state the experimental conditions will in many cases not allow for the formation of such states. Rapid solidification techniques with cooling rates of about one million centigrades per min yielded for many Al alloys fully crystalline solid states (see Reference in attached link).
https://www.researchgate.net/profile/P_Mourik/publications?pubType=thesis
Dear Sadeem
The attached paper investigates the Cu–Mg cluster formation during cooling conditions close to industrial quenching in an Al–Cu–Mg alloy. In addition, a cooling profile with faster rates at high temperature is performed in order to investigate the influence of excess vacancies on the Cu–Mg cluster formation.
It may help you in your study.
Good Luck
Ahmed Saeed Hassanien
And also this paper may assist you
Quench induced residual stress prediction in heat treatable 7xxx aluminium alloy thick plates using Gleeble interrupted quench tests
Dear Dr. sadeem,
I agree with what Dr. Mourik want to say that there is a rapid competition of the kinetics with thermodynamics of the phase transformation. Yet there is a possibility to achieve an amorphous phase by fast cooling quenching technique, as it is pointed out by Dr. Hassanien.....
Suresh K. Sharma
Dear Dear Sadeem Fadhil,
1. It seems to me that the experimentally possible cooling rates do not allow that the Al alloy indicated become fully a metal glass,
2. Further it seems to me that on successful quenching from a solid or liquid solution all or at least the most of alloying elements remain in solid solution.
3. Point 2 indicates that new phases, e.g. glassy phases, emerge as a result of some ageing treatment. The behaviour of quenched-in vacancies during this ageing will be essential for this precipitation.
4. As far as I can see possible cluster formation during this ageing treatment can be compared to classical first stages of precipitation in Al alloys.
5. The foregoing may imply that to denote these clusters as glassy is very much in the eye of the beholder.
Dear Dr Ahmad , Dr. Suresh and Dr. P. Van Mourik
Thank you so much for your worthy answers, so from that I can conclude its not easy to get such phases in such system. However are there any additional elements that may be added to it to induce the formation of glassy phases in such system.
Thank you
- Badges
- Science topic
- Similar topics
- Methodology
- Research Methodology
- Research Papers