THE INTRINSIC FATIGUE THRESHOLD OF 25CR2NI2MOV STEEL
Fatigue crack growth tests of 25 Cr2 Ni2 MoV steel with two different heat treatments（550℃× 20 h,580℃× 20 h） were conducted at stress ratios R of 0.1,0.3,0.5 and 0.7,and the fatigue threshold,△K<sub>th</sub>,and microscopic mechanism were investigated.Results showed that △K<sub>th&...
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Editorial Office of Journal of Mechanical Strength
2020-01-01
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| Series: | Jixie qiangdu |
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| Online Access: | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2020.06.009 |
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| author | SHEN XueCheng DU YanNan ZHU MingLiang HUANG YuHui XUAN FuZhen |
| author_facet | SHEN XueCheng DU YanNan ZHU MingLiang HUANG YuHui XUAN FuZhen |
| author_sort | SHEN XueCheng |
| collection | DOAJ |
| description | Fatigue crack growth tests of 25 Cr2 Ni2 MoV steel with two different heat treatments（550℃× 20 h,580℃× 20 h） were conducted at stress ratios R of 0.1,0.3,0.5 and 0.7,and the fatigue threshold,△K<sub>th</sub>,and microscopic mechanism were investigated.Results showed that △K<sub>th</sub> increased with the decrease of R,and the heat treatment had varied effects on △K<sub>th</sub>under lower R,while it had less effect under higher R.Fracture morphology observation showed that there existed a large number of facet morphology under lower R,while the facet morphology was gradually reduced with the increase of R.Additionally,the percentage of facet morphology followed a parabolic pattern with △K.It is indicated that R and heat treatment are important influencing factors on △K<sub>th</sub>.The crack growth at higher R has weak effect of crack closure,representing the fatigue resistance of the material,and thus can be regarded as the intrinsic property of the material which can be estimated by the proposed model. |
| format | Article |
| id | doaj-art-5a0030ea839647f1a7b52c5f6781934f |
| institution | Kabale University |
| issn | 1001-9669 |
| language | zho |
| publishDate | 2020-01-01 |
| publisher | Editorial Office of Journal of Mechanical Strength |
| record_format | Article |
| series | Jixie qiangdu |
| spelling | doaj-art-5a0030ea839647f1a7b52c5f6781934f2025-01-15T02:26:49ZzhoEditorial Office of Journal of Mechanical StrengthJixie qiangdu1001-96692020-01-01421332133630609302THE INTRINSIC FATIGUE THRESHOLD OF 25CR2NI2MOV STEELSHEN XueChengDU YanNanZHU MingLiangHUANG YuHuiXUAN FuZhenFatigue crack growth tests of 25 Cr2 Ni2 MoV steel with two different heat treatments（550℃× 20 h,580℃× 20 h） were conducted at stress ratios R of 0.1,0.3,0.5 and 0.7,and the fatigue threshold,△K<sub>th</sub>,and microscopic mechanism were investigated.Results showed that △K<sub>th</sub> increased with the decrease of R,and the heat treatment had varied effects on △K<sub>th</sub>under lower R,while it had less effect under higher R.Fracture morphology observation showed that there existed a large number of facet morphology under lower R,while the facet morphology was gradually reduced with the increase of R.Additionally,the percentage of facet morphology followed a parabolic pattern with △K.It is indicated that R and heat treatment are important influencing factors on △K<sub>th</sub>.The crack growth at higher R has weak effect of crack closure,representing the fatigue resistance of the material,and thus can be regarded as the intrinsic property of the material which can be estimated by the proposed model.http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2020.06.00925Cr2Ni2MoV steelFatigue thresholdStress ratioCrack closurePhysical essence |
| spellingShingle | SHEN XueCheng DU YanNan ZHU MingLiang HUANG YuHui XUAN FuZhen THE INTRINSIC FATIGUE THRESHOLD OF 25CR2NI2MOV STEEL Jixie qiangdu 25Cr2Ni2MoV steel Fatigue threshold Stress ratio Crack closure Physical essence |
| title | THE INTRINSIC FATIGUE THRESHOLD OF 25CR2NI2MOV STEEL |
| title_full | THE INTRINSIC FATIGUE THRESHOLD OF 25CR2NI2MOV STEEL |
| title_fullStr | THE INTRINSIC FATIGUE THRESHOLD OF 25CR2NI2MOV STEEL |
| title_full_unstemmed | THE INTRINSIC FATIGUE THRESHOLD OF 25CR2NI2MOV STEEL |
| title_short | THE INTRINSIC FATIGUE THRESHOLD OF 25CR2NI2MOV STEEL |
| title_sort | intrinsic fatigue threshold of 25cr2ni2mov steel |
| topic | 25Cr2Ni2MoV steel Fatigue threshold Stress ratio Crack closure Physical essence |
| url | http://www.jxqd.net.cn/thesisDetails#10.16579/j.issn.1001.9669.2020.06.009 |
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