Fired,gunpowder gas is quite huge, which can be veryalarge, which gun
Fired,gunpowder gas is extremely big, which can be veryalarge, which gun is usually a main part inside the inner chamber tension; then, as the gas stress drops and role inner fired, the stress then, gunpowder gas is drops and which plays a significant the in the inner chamber tension;on the as the gas pressure very massive, the inner chamber temperature chamber temperature rises, the the gas stress drops and also the inner chamber temperature thermal strain will play a leading part, so the inner chamber inner chamber tension; then, play rises, the thermal strain will as a top role, so the inner chamber tension appears as tension seems as shown in Figure eight.aOn the other hand, for the CrN/Cr composite coating rises, in Figure 8. On the will play top CrN/Cr composite chamber anxiety due to the the thermal strain other hand, for the function, so the inner coating barrel, seems as shown barrel, due to the8. On the other hand, forthe inner chamber for the duration of launch (Figure five), it shown in Figure greater temperature in the CrN/Cr composite coating greater thermal higher temperature in the inner chamber during launch (Figure five), it has barrel, due to the has greater thermal anxiety, so the peak strain (1983 launchis also Nimbolide Biological Activity larger thangreater coating higher the peak stress (1983 MPa) is also larger MPa) (Figure 5), it has the Cr thermal stress, sotemperature within the inner chamber in the course of than the Cr coating barrel (1160 MPa). barrel (1160 MPa). tension (1983 MPa) can also be greater than the Cr coating barrel (1160 MPa). tension, so the peak2000Von-mises Stress/MPa Von-mises Stress/MPaCr Cr CrN/Cr CrN/Cr1500 1500 1000 1000 500 500 0 0 0.000 0.000 0.002 0.002 0.004 0.004 0.006 0.008 0.008 0.010 0.Figure 8. Variation curves of maximum tension in inner bore of Cr coating barrel and CrN/Cr comFigure 8. Variation curves of maximum Figure 8. Variation curves of maximum stress inner bore of of coating barrel and CrN/Cr composite coating barrel with gun firing time. strain inin inner bore Cr Cr coating barrel and CrN/Cr posite coating barrel with gun firing time. composite coating barrel with gun firing time.Time/s 0.006 Time/sCoatings 2021, 11, x FOR PEER Critique Coatings 2021, 11, 1358 Coatings 2021, 11, x FOR PEER REVIEW9 of 11 of 11 9 9ofFigures 9 and 10 show the total deformation on the Cr coating barrel plus the CrN/Cr Figures 9 and barrel below the deformation of of Cr coating barrel chamber presFigures 9 and ten show the total deformation of thethermal tension andand the CrN/Cr composite coating ten show the total coupling effect the Cr coating barrel as well as the CrN/Cr composite coating barrel under the coupling effect of thermal stress and throughout launch composite coating Tenidap Inhibitor barrelthe maximum deformation from the Cr coating barrel chamber stress. It could be noticed that beneath the coupling impact of thermal strain and chamber pressure. sure. be noticed observed that the maximum deformation Cr CrN/Cr composite coating barrel It canis 0.56 bethat the the maximum deformationthe the coating barrel through launch time time It could mm, and maximum deformation of ofof the Cr coating barrel through launch time is 0.56 and as well as the maximum deformation of CrN/Cr composite coating barrel is is 0.56 mm, which can be maximum in the Cr coating the the attributing to greater elastic barrel is 0.29 mm, mm, the about half deformation of barrel, CrN/Cr composite coating modis 0.29 CrN/Cr than Cr (Table 1), resulting barrel, attributing to to larger barrel. The 0.29 mm, which is about half of thethe Cr coating barrel, attributinghigher.
