Grain Refinement of AA7475 Based Aluminum Alloy Sheets by a Warm Rolling with Heated Rolls and its Effect on Texture and Mechanical Properties

Tanaka, Hiroaki; Minoda, Tadashi; Esaki, Hiroki; Shibue, Kazuhisa; Yoshida, Hideo

doi:10.4028/www.scientific.net/msf.396-402.499

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, a certain degree of tilting is found in these nuclei during the subsequent recrystallization annealing to accommodate the co-growth of surrounding grains. In particular, the frequency and extent of such tilting are increased in the case of inhomogeneous energy distribution, resulting in a large number of randomly oriented recrystallized grains in WCR samples [17,40], as displayed in Figure 13. However, the sub-grain coarsening may appear at a relatively high rolling temperature (800 • C), especially for the nuclei with {111} orientation.…”

Section: Recrystallized Microstructure Homogeneitymentioning

confidence: 99%

“…Warm rolling (WR) refers to the mechanical processing of metals above the cold rolling state but below the recrystallization temperature or hot rolling state [11,12]. At present, there is a vast body of experimental data showing that WR could be effectively employed to control the uniformity of microstructure and texture in titanium (Ti) [13], aluminum (Al) [14], textured low-alloy ferritic steel [15], tungsten (W) [16] and aluminum alloys [17]. It was discussed by Murty et al [18] that fine microstructure and high strength were obtained by WR in the Ti-6Al-4V bars.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Warm Crossing Rolling on the Microstructure, Texture and Annealing Behavior of High-Purity Tantalum

Ding

Wang

Zhang

et al. 2023

Metals

View full text Add to dashboard Cite

With advanced integrated circuit semiconductor chips, the uniformity of microstructure and texture is increasingly required for tantalum (Ta) targets. A combination of warm rolling and 135° cross rolling (CR) at the temperature of 500 °C and 800 °C, i.e., warm cross rolling (WCR), was carried out in tantalum (Ta) plates to investigate the evolution of deformed microstructure and texture. Subsequently, these rolled samples were annealed to analyze the recrystallized microstructure. Results exhibited that WCR samples formed a relatively uniform and weak texture distribution along the thickness direction. The reduction in the proportion of low-angle grain boundaries (LAGBs) was associated with the lower Peierls stresses to be overcome for dislocation motion due to thermal activation in the WCR sample. High grain boundary energy was observed in WCR samples, and WCR can promote dynamic recovery of samples to produce sub-crystals (thermodynamically unstable and serving as nuclei for subsequent recrystallization). Fine average grain size and high content of recrystallized grains with random orientation were obtained after annealing in the WCR sample. This study will provide a theoretical reference for the precise optimization of tantalum process parameters and the improvement in the target material’s performance.

show abstract

Section: Recrystallized Microstructure Homogeneitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Warm Crossing Rolling on the Microstructure, Texture and Annealing Behavior of High-Purity Tantalum

Ding

Wang

Zhang

et al. 2023

Metals

View full text Add to dashboard Cite

show abstract

“…In prior studies, 4,5,7) it was revealed that control of roll temperature and addition of zirconium are important to refine microstructures of AA7475 based aluminum alloy sheets after a solution heat treatment. In the studies, a new type of roll embedded cylindrical heaters was used and prevented reduction of sample temperature in the warm rolling process.…”

Section: Introductionmentioning

confidence: 99%

Improvement of Mechanical Properties of 7475 Based Aluminum Alloy Sheets by Controlled Warm Rolling

et al. 2004

Self Cite

View full text Add to dashboard Cite

An attempt was made to refine the grain structure of 200 mm wide sheets of AA7475 based aluminum alloys containing zirconium by employing a new warm rolling method under the control of both roll temperature and material temperature. The warm rolled sheets as solution heat treated had subgrain structures through the thickness with a high proportion of low angle boundary less than 15. The average subgrain diameter was approximately 3 mm. The strength of the warm rolled sheets in T6 condition was about 10% higher than that of conventional AA7475 alloy sheets produced by cold rolling. As the most remarkable point in the warm rolled sheets, the high Lankford (r) value of 3.5 was measured in the orientation of 45 to rolling direction, with the average r-value of 2.2. The high r-value would be derived from well developedfiber textures, especially with the strong f011gh211i Brass component. The warm rolled sheets also had high resistance to SCC. From Kikuchi lines analysis and TEM images, it was found that PFZs were hardly formed along the low angle boundaries of the warm rolled sheets in T6 condition. This would be a factor to lead to the improvement of resistance to SCC because of reducing the difference in electrochemical property between the grain boundary area and the grain interior.

show abstract

Mechanical properties of 7475 aluminum alloy sheets with fine subgrain structure by warm rolling

Tanaka

Minoda

2014

Transactions of Nonferrous Metals Society of China

View full text Add to dashboard Cite

Grain Refinement of AA7475 Based Aluminum Alloy Sheets by a Warm Rolling with Heated Rolls and its Effect on Texture and Mechanical Properties

Cited by 3 publications

References 0 publications

Effect of Warm Crossing Rolling on the Microstructure, Texture and Annealing Behavior of High-Purity Tantalum

Effect of Warm Crossing Rolling on the Microstructure, Texture and Annealing Behavior of High-Purity Tantalum

Improvement of Mechanical Properties of 7475 Based Aluminum Alloy Sheets by Controlled Warm Rolling

Mechanical properties of 7475 aluminum alloy sheets with fine subgrain structure by warm rolling

Contact Info

Product

Resources

About