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grain growth
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Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240117
EISBN: 978-1-62708-251-8
... Abstract Annealing, a heat treatment process, is used to soften metals that have been hardened by cold working. This chapter discusses the following three distinct processes that can occur during annealing: recovery, recrystallization, and grain growth. The types of processes that occur during...
Abstract
Annealing, a heat treatment process, is used to soften metals that have been hardened by cold working. This chapter discusses the following three distinct processes that can occur during annealing: recovery, recrystallization, and grain growth. The types of processes that occur during recovery are the annihilation of excess point defects, the rearrangement of dislocations into lower-energy configurations, and the formation of subgrains that grow and interlock into sub-boundaries. The article also discusses the main factors that affect recrystallization. They are temperature and time; degree of cold work; purity of the metal; original grain size; and temperature of deformation. The types of grain growth discussed include normal or continuous grain growth and abnormal or discontinuous grain growth.
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Published: 01 August 2015
Fig. 5.29 Microphotographs of grain sizes. Austenite grain growth in a normal 0.5% C hypoeutectoid steel (silicon deoxidized). 180 HV steel, 0.50C-0.06Si-0.7Mn (wt%). Picral etch. (a) Austenitized for 1 h at 850 °C, cooled at 300 °C/h. Austenite grain size, ASTM No. 5. 100×. (b) Austenitized
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in Deformation and Recrystallization of Titanium and Its Alloys[1]
> Titanium: Physical Metallurgy, Processing, and Applications
Published: 01 January 2015
Fig. 5.25 Effect of annealing temperature on grain size of Ti-5Al-2.5Sn. Grain growth is very rapid at the beta transus temperature (1015 °C, or 1860 °F) and higher.
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Published: 01 December 2008
Fig. 9.3 The rate of grain growth of pure iron. The parameters such as the grain-boundary diffusion coefficient the are same as in Exercise 5.16 .
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in Sintering Concepts Relevant to Greater Density and Improved Properties
> Powder Metallurgy and Additive Manufacturing: Fundamentals and Advancements
Published: 30 September 2024
Fig. 6.14 Logarithmic plot of grain size versus time to show grain growth behavior for copper during isothermal sintering at 850 °C (1560 °F). The slope of the graph shows that mean grain volume is a linear function of hold time.
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Published: 01 June 2008
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Published: 01 June 2008
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Published: 01 June 2008
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Published: 01 November 2007
Fig. 8.10 One-hour grain growth is suppressed by adding very small amounts of niobium to a 1040 steel. Source: Ref 8.6
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Published: 01 November 2007
Fig. 8.12 Grain growth in a plain carbon 1018 steel versus a triple-alloyed 8620 steel at 1010 °C (1850 °F). The alloying elements cause a grain-boundary drag effect and inhibit grain growth. Source: Ref 8.7
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Published: 01 March 2002
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Published: 01 August 1999
Fig. 8.8 (Part 1) Austenite grain growth in a normal 0.5% C hypoeutectoid steel (silicon deoxidized). 0.50C-0.06Si-0.7Mn (wt%). (a) Austenitized for 1 h at 850 °C, cooled at 300 °C/h. Austenite grain size: ASTM No. 5. 180 HV. Picral. 100×. (b) Austenitized for 1 h at 900 °C, cooled at 300
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Published: 01 August 1999
Fig. 8.8 (Part 3) Austenite grain growth in a normal 0.5% C hypoeutectoid steel (silicon deoxidized). 0.50C-0.06Si-0.7Mn (wt%). (a) Austenitized for 1 h at 850 °C, cooled at 300 °C/h. Austenite grain size: ASTM No. 5. 180 HV. Picral. 100×. (b) Austenitized for 1 h at 900 °C, cooled at 300
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Published: 01 August 1999
Fig. 8.9 (Part 1) Austenitic grain growth in a normal low-carbon (0.15% C) hypoeutectoid steel. 0.17C-0.41Mn-0.06Si (wt%). (a) Austenitized at 850 °C, cooled at 300 °C/h. 105 HV. Nital. 100×. (b) Austenitized at 850 °C, cooled at 300 °C/h. 105 HV. Picral. 100×. (c) Austenitized at 900 °C
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Published: 01 August 1999
Fig. 8.9 (Part 2) Austenitic grain growth in a normal low-carbon (0.15% C) hypoeutectoid steel. 0.17C-0.41Mn-0.06Si (wt%). (a) Austenitized at 850 °C, cooled at 300 °C/h. 105 HV. Nital. 100×. (b) Austenitized at 850 °C, cooled at 300 °C/h. 105 HV. Picral. 100×. (c) Austenitized at 900 °C
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Published: 01 August 1999
Fig. 8.10 (Part 1) Austenitic grain growth in a fine-grained 0.5% C hypoeutectoid steel (aluminum deoxidized). 0.43C-0.23Si-0.75Mn (wt%). (a) Austenitized for 1 h at 850 °C, cooled at 300 °C/h. Grain size: ASTM No. 7. 180 HV. Picral. 100×. (b) Austenitized for 1 h at 900 °C, cooled at 300
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Published: 01 August 1999
Fig. 8.10 (Part 2) Austenitic grain growth in a fine-grained 0.5% C hypoeutectoid steel (aluminum deoxidized). 0.43C-0.23Si-0.75Mn (wt%). (a) Austenitized for 1 h at 850 °C, cooled at 300 °C/h. Grain size: ASTM No. 7. 180 HV. Picral. 100×. (b) Austenitized for 1 h at 900 °C, cooled at 300
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Published: 01 August 1999
Fig. 8.11 (Part 1) Austenitic grain growth in a 1.4% C hypereutectoid steel (aluminum treated). 1.42C-0.21Si-0.36Mn-0.002Al (wt%). A cm = ~965 °C. (a) Austenitized at 900 °C, cooled at 300 °C/h. 230 HV. Sodium picrate. 100×. (b) Austenitized at 900 °C, cooled at 300 °C/h. 230 HV. Sodium
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Published: 01 August 1999
Fig. 8.11 (Part 2) Austenitic grain growth in a 1.4% C hypereutectoid steel (aluminum treated). 1.42C-0.21Si-0.36Mn-0.002Al (wt%). A cm = ~965 °C. (a) Austenitized at 900 °C, cooled at 300 °C/h. 230 HV. Sodium picrate. 100×. (b) Austenitized at 900 °C, cooled at 300 °C/h. 230 HV. Sodium
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Published: 01 August 1999
Fig. 4.8 (Part 1) Critical grain growth during subcritical annealing of low-carbon steel. Rimming grade. 0.09C-0.005Si-0.43Mn (wt%). Annealed 2 h at 650 °C after tensile elongation of: (a) 2%, (b) 5%, (c) 8%, (d) 15%, (e) 20%, and (f) 30%. All etched in 3% nital. 100×. Figure 4.7
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