The oxygen equivalence number of a weld is a number that can be used to predict propertiessuch as hardness, strength, and ductility. The article “Advances in Oxygen EquivalenceEquations for Predicting the Properties of Titanium Welds" (D. Harwig, W. Ittiwattana, andH. Castner, The Welding Journal, 2001:126s–136s) presents several equations forcomputing the oxygen equivalence number of a weld. An equation designed to predict thestrength of a weld is X = 1.12C + 2.69N + O – 0.21 Fe, where X is the oxygen equivalence,and C, N, O, and Fe are the amounts of carbon, nitrogen, oxygen, and iron, respectively, in0.0247, HNweight percent, in the weld. Suppose that for welds of a certain type, Hc =0.0255, Ho= 0.0340, and OFe= 0.0597, ởC0.0131, ƠN = 0.0194, oo0.1668, µFe0.0413. Furthermore assume that correlations are given by PC.N = -0.44, PC.0 = 0.58, PC,Fe= 0.39, PN,0= -0.35.= -0.32, PN.Fe = 0.09, andPO,FeFind µx-a.Find Cov(C, H), Cov(C, O), Cov(C, Fe), Cov(N, 0), Cov(N, Fe), and Cov(O, Fe).Find Ox.b.C.

a. The linear function of X is given as, X = 1.12C + 2.69N + O –0.21 Fe.

Answered: The oxygen equivalence number of a weld…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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