高强钢断裂韧性K_(IC)的小尺寸试样评价方法
Small Size Specimen Evaluation Method for Fracture ToughnessK_(IC) of High Strength Steel
查看参考文献13篇
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文摘
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研究了不同尺寸的0Cr13Ni8Mo2Al沉淀硬化高强钢断裂韧性试样的断口形貌和断裂机理。结果表明:断裂韧性试样的拉断区可分为裂纹慢速扩展区(解理区)和快速扩展区(韧窝区);而断裂能,则主要消耗在裂纹慢速扩展区内。本文建立了断裂韧性K_(IC)的小尺寸试样评价方法。根据该方法,使用小尺寸试样测得的断裂韧性K_(IC)值与使用标准试样测得的断裂韧性K_(IC)值之间的相对误差为9%,没有超过10%。这个结果表明,使用小尺寸试样评价方法测出的金属材料的断裂韧性K_(IC)值是十分可靠的。 |
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其他语种文摘
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ABSTRAT In the present study, the 0Cr13Ni8Mo2Al precipitation hardening high strength steel was selected as the experimental material, and the fracture morphologies and the relevant mechanisms of fracture toughness specimens with different sizes were studied. Results show that, according to the difference of fracture mechanisms, the tensile fracture region of fracture toughness specimens can be divided into crack slow propagation zone (cleavage zone) and fast propagation zone (dimple zone); and the fracture energy is mainly consumed in the crack slow propagation zone. A small size specimen evaluation method for fracture toughness K_(IC) was established in this study, and the relative error between the fracture toughness K_(IC) value obtained with this method and that with the standard specimen is 9%. This means that the fracture toughness K_(IC) value of the metallic materials obtained with the small size specimen evaluation method is very reliable. |
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来源
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材料研究学报
,2018,32(8):561-566 【核心库】
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DOI
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10.11901/1005.3093.2018.107
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关键词
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金属材料
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高强钢
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小尺寸试样
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断裂机理
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断裂韧性K_(IC)
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地址
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1.
中国科学院大学, 北京, 100049
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中国科学院金属研究所材料疲劳与断裂研究部, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-3093 |
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学科
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金属学与金属工艺 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:6319316
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