The Charpy V-notch (CVN) technique measures impact energy and is often used to determine whether or not a material exper
Posted: Sun Jul 10, 2022 10:52 am
- The Charpy V Notch Cvn Technique Measures Impact Energy And Is Often Used To Determine Whether Or Not A Material Exper 1 (33.36 KiB) Viewed 98 times
The Charpy V-notch (CVN) technique measures impact energy and is often used to determine whether or not a material experiences a ductile-to-brittle transition with decreasing temperature. Ten measurements of impact energy (in J) on specimens of steel cut at 60°C are as follows: 62. 9, 65. 3, 66. 4, 65. 1, 63.0, 65. 2, 65. 9, 67. 3, 62. 4, 66.4 a) Find a 90% CI for u, the mean impact energy for that kind of steel. [ 64.02 : 2/2.0 65.96 -2.0 (Enter your answer correct to 2 decimal places) b) Determine the minimum number of specimens so that we are 90% confident of estimating mean impact energy to within 0.5 Jof its correct value. Use the sample standard deviation from the above data as an initial guess of the value for the true standard deviation. 38 : 0/3.0 x (Enter your answer as an integer)