Precipitation behavior during homogenization of direct chill cast aluminum alloy 1100
| Autor: | Shigenori Asami, Takeyoshi Doko |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
Materials science
Precipitation (chemistry) Mechanical Engineering Alloy Metallurgy Metals and Alloys Intermetallic chemistry.chemical_element engineering.material Homogenization (chemistry) chemistry Mechanics of Materials Aluminium Transmission electron microscopy Materials Chemistry engineering Ingot Dissolution |
| Zdroj: | Journal of Japan Institute of Light Metals. 38:319-327 |
| ISSN: | 0451-5994 |
| DOI: | 10.2464/jilm.38.319 |
| Popis: | The precipitation behavior during homogenization of DC cast aluminum alloy 1100 has been invesigated by means of electrical resistivity measurement and transmission electron microscopy. Precipitation is accelerated above 300°C and small AlFeSi precipitates (mainly of α-AlFeSi) are observed around 450°C, when ingot is heated up at a rate of 50°C/hr. The precipitates grow and disperse in matrix along with dissolution of α-AlFeSi, precipitation of Al3Fe and probable transformation from α to Al3Fe, when heated above 500°C or held at each temperature. Al3Fe also precipitates at the interface between crystallized intermetallic compound and matrix above 550°C, and no precipitates exist in the matrix after prolonged holding at 600°C. In case where the ingot is cooled down at 20°C/hr and held after homogenization at 550°C the 3hr, precipitation progresses with almost constant distribution in matrix. The precipitates appear in matrix at lower temperature around 400°C and after prolonged holding below 500°C, when the ingots are cooled after heating at 600°C for 9hr. |
| Databáze: | OpenAIRE |
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