SURFACE YIELD STRENGTH VERSUS FATIGUE LIMIT FOR STEELS
SURFACE YIELD STRENGTH VERSUS FATIGUE LIMIT FOR STEELS
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DOI：
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发表时间：
1991-05
影响因子：
2.3
通讯作者：
W. Hongwei;Ma Jinsheng;Nan Junma
中科院分区：
文献类型：
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作者：
W. Hongwei;Ma Jinsheng;Nan Junma
用X射线衍射法测定不同高碳合金钢的表面屈服强度σ_(Ms)远低于体相屈服强度。它将反映抗表面塑性变形的参数。材料的光滑疲劳极限σ_(-1)几乎由裂纹萌生控制，应与累积损伤和抗裂纹萌生能力有关。实验结果表明，对于不同类型的钢，50%存活率的σ_(Ms)=(0.81-1.02)σ_(-1)和99.9%存活率的σ_(Ms)=(0.98-1.1)σ_(-1)的关系。表面屈服强度的确定似乎比疲劳极限容易得多，工程上的应用也是可能的。
The surface yield strength, σ_(ms), of different high carbon alloy steels,examined by X-ray diffraction method, is far lower than the bulk one. It will reflect the parameter for resistance to surface plastic deformation. The smooth fatigue limit,σ_(-1), of materials, which is almost controlled by the crack initiation, should be associated with the damage of accumulation and the resistance against crack initiation.Experimental results show that the relations of σ~(ms)=(0.81-1.02)σ_(-1) for 50％ survival and σ_(ms)=(0.98-1.1)σ_(-1) for 99.9％ survival are exhibited for different types of steels. It seems to be much easier to etermine the surface yield strength than the fatigue limit, and an application for engineering purposes might be available.