Figure 6. Variation in the Vicker’s hardness with ageing time t for the alloys aged at: (a) 120°C, (b) 140°C, and (c) 180°C

From

Heat Treatment and Friction Stir Processing Effects on Mechanical Properties and Microstructural Evolution of Sc Inoculated Al-Zn-Mg Alloys

P. K. Mandal

Materials Science and Metallurgy Engineering. 2017, 4(1), 16-28 doi:10.12691/msme-4-1-2