首页 金属材料的疲劳极限 铝合金的疲劳极限

铝合金的疲劳极限

材 料 静强度指标 试验条件 寿命N

疲劳极限均值

σr/MPa

标准差

变异系数

r ασ Sr/MPa
2A12B

σb=455~480MPa

σs=343~438 MPa

δ=8%~19% 

0.1 1 104 411.9 22.88 0.055 55
5×104 369.7 18.63 0.050 39
105 329.5 13.41 0.040 70
5×105 293.2 11.77 0.040 14
106 264.8 9.807 0.037 04
5×106 243.2 9.15 0.037 62
107 223.6 7.522 0.033 64
3 104 245.2 13.07 0.053 30
5×104 191.2 9.15 0.047 86
105 161.8 7.522 0.046 49
5×105 134.4 5.227 0.038 89
106 114.7 4.246 0.037 02
5×106 106.9 3.923 0.036 70
107 103 3.599 0.034 94
5 104 194.2 9.15 0.047 12
5×104 148.1 6.541 0.044 17
105 120.6 4.904 0.040 66
5×105 99.05 3.923 0.039 61
106 87.28 3.266 0.037 42
5×106 84.34 3.266 0.038 72
107 82.38 2.941 0.035 70
0.5 1 5×104 459 21.58 0.047 02
105 405 17.33 0.042 79
5×105 360.9 15.03 0.041 65
106 347.2 13.73 0.039 54
5×106 328.5 12.09 0.036 80
107 319.7 11.77 0.036 82
3 104 343.2 16.35 0.047 64
5×104 268.7 11.77 0.043 80
105 211.8 8.826 0.041 67
5×105 169.7 6.541 0.038 54
106 151 5.227 0.034 62
5×106 145.1 5.227 0.036 02
107 143.2 4.904 0.034 25
5 104 299.1 14.71 0.049 18
5×104 222.6 10.46 0.046 99
105 161.8 6.541 0.040 43
5×105 129.4 5.227 0.040 39
106 115.7 4.246 0.036 70
5×106 109.8 3.923 0.035 73
107 104 2.941 0.028 28
-0.5 3 105 117.5 5.816 0.049 50
5×105 108.5 4.776 0.044 02
106 100 3.923 0.039 23
5×106 92.19 3.599 0.039 04
107 87.77 2.942 0.033 52
2A12-T4

σb=407MPa

σs=270MPa

δ=13%

0.1 1.16 105 202 9.483 0.046 95
5×105 146.1 6.541 0.044 77
106 125.5 4.58 0.036 49
5×106 115.7 4.246 0.036 70
107 110.8 3.923 0.035 41

σb=457MPa

σs=336MPa

δ=18.7%

0.02 1 105 277.5 14.05 0.050 63
5×105 195.2 8.826 0.045 22
106 144.2 5.561 0.038 56
5×106 132.4 4.58 0.034 59
0.6 1 5×105 331.5 15.69 0.047 33
106 309.9 12.43 0.040 11
5×106 274.6 9.807 0.036 71
2A12-T6

σb=429~433MPa

σs=364~370MPa

δ=6.6%~7.8%

0.1 1 5×104 353.1 21.25 0.060 18
105 240.5 11.44 0.047 57
5×105 176.5 7.189 0.040 73
106 139.3 5.227 0.037 52
5×106 133.4 4.904 0.036 76
107 131.4 4.68 0.035 62
0.5 1 5×104 470.7 22.88 0.048 61
105 372.7 16.35 0.043 87
5×105 304 11.77 0.038 72
106 255 8.826 0.034 61
5×106 225.6 7.846 0.034 78
107 206.9 6.865 0.033 18
7A09

σb=647MPa

σs=603MPa

δ=17.2%

-1 1 5×104 303 14.05 0.046 37
105 261.8 12.75 0.048 70
5×105 220.7 8.826 0.039 99
106 188.3 7.189 0.038 18
5×106 170.6 6.208 0.036 39
107 161.8 5.561 0.034 37
2.4 5×104 187.3 8.826 0.047 12
105 154 6.541 0.042 47
5×105 131.4 5.227 0.039 78
106 113.8 4.246 0.037 31
5×106 98.07 3.599 0.036 70
107 93.17 3.266 0.035 05
0.1 1 105 269.7 13.41 0.049 72
5×105 199.1 8.169 0.041 03
106 161.8 5.561 0.034 37
5×106 142.2 4.904 0.034 49
107 130.4 4.246 0.032 56
3 105 124.5 5.884 0.047 26
5×105 93.17 4.246 0.045 57
106 76.49 2.942 0.038 46
5×106 70.61 2.618 0.037 08
107 66.69 2.285 0.034 26
5 5×104 115.7 6.865 0.059 33
105 81.4 4.246 0.052 16
5×105 63.75 2.618 0.041 07
106 57.86 2.285 0.039 49
5×106 54.92 1.961 0.035 71
107 52.96 1.795 0.033 89
0.5 1 105 431.5 26.16 0.060 63
5×105 262.8 13.41 0.051 03
106 228.5 10.79 0.047 22
5×106 204 7.846 0.038 46
107 186.3 5.884 0.031 58
3 105 178.5 9.807 0.054 94
5×105 144.2 6.208 0.043 05
106 127.5 4.904 0.038 46
5×106 116.3 4.119 0.035 42
107 109.8 3.599 0.032 78
5 5×104 166.7 8.169 0.049 00
105 117.1 4.904 0.041 67
5×105 92.19 3.599 0.039 04
106 82.38 3.267 0.039 67
5×106 78.46 2.618 0.033 37
107 76.49 2.618 0.034 23

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