鉄鋼の疲労強度に及ぼすNiメッキの影響 : 切欠き材の場合

概要

論文の詳細を見る
So far as the author is aware, little is known about the fatigue strength of plated steel with notch. As the problem is interesting from a practical point of view, a fatigue test is hereunder reported as having been carried out on nickel plated steel with notch. The fatigue test specimens used in the test were 10mm in diameter and were made of annealed S10C steel (0.13%C, 0.29%Si, 0.54%Mn), and of annealed and quenched and tempered S40C steel (0.39%C, 0.26%Si, 0.72%Mn). The specimens were notched with 60°V-shaped circumferential grooves of depths respectively varying as 0.05, 0.10, 0.97 mm, worked with a correctly contoured tool. Stress concentration factors are respectively 1.9, 2.2, 3.3. The fatigue test specimens were plated with nickel in the standard Watt's type bath, having the composition NiSO_4・7H_2O ; 240g/l, NiCl_2・6H_2O ; 45g/l, H_3BO_3; 30g/l. The temperature of both was kept at 25℃, the cathod current density was kept at 1 A/dm^2. The average thickness of nickel plating was 0.085 mm. The results obtained are summarized as follows; (1) The fatigue limit of plain steel become lower by nickel plating or notch. The barder the steel is the more effective the plating is, and so is the notching. (2) In plain steel the higher the fatigue limit is when unplated, the more remarkable the drop of fatigue limit is when plated. But in notched steel the harder the steel is the less conspicuous the drop of fatigue limit is from unplated to plated. (3) The ratio of drop of fatigue limit in plated notched steel is determined by the product of the ratios of the drop of fatigue limit from unplated to plated in the individual plains steel specimens, except in S10C steel in which the ratio is smaller than the product. (4) The drop of fatigue limit in nickel plated steel seems to be due to the crack in plate layers.
社団法人日本材料学会の論文
1967-09-15

鉄鋼の疲労強度に及ぼすNiメッキの影響 : 切欠き材の場合

スポンサーリンク

概要

著者

関連論文

スポンサーリンク