Mechanical Properties of σ-Phase and Its Effect on the Mechanical Properties of Austenitic Stainless Steel

被引：2
|
作者：
Qiao, Peiheng [1 ,2 ]
Xie, Jinyang [1 ,2 ]
Jiang, Yong [1 ,2 ]
Tang, Pengjie [3 ]
Liang, Bin [3 ]
Lu, Yilan [4 ]
Gong, Jianming [1 ,2 ]
机构：
[1] Nanjing TECH Univ, Sch Mech & Power Engn, 30 Puzhu South Rd, Nanjing 211816, Peoples R China
[2] Jiangsu Key Lab Design & Manufacture Extreme Press, Nanjing 211816, Peoples R China
[3] Nanjing Bolier & Pressure Vessel Inspection Inst, Nanjing 210019, Peoples R China
[4] McGill Univ, Dept Mech Engn, Montreal, PQ H3A 0C3, Canada
来源：
COATINGS | 2022年 / 12卷 / 12期
关键词：
sigma-phase; austenitic stainless steel; nano-indentation; mechanical properties; ELASTIC-PLASTIC PROPERTIES; SECONDARY PHASES; INDENTATION; PRECIPITATION; HARDNESS; EMBRITTLEMENT; TOUGHNESS; EVOLUTION; CORROSION; MODULUS;
D O I：
10.3390/coatings12121917
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this present paper, the mechanical properties of sigma-phase and its effect on the mechanical properties of 304H austenitic stainless steel after servicing for about 8 years at 680-720 degrees C were studied by nano-indentation test, uniaxial tensile test, and impact test. The results showed that the nano-hardness (H), Young's modulus (E), strain hardening exponent (n), and yield strength (sigma(y)) of sigma-phase were 14.95 GPa, 263 GPa, 0.78, and 2.42 GPa, respectively. The presence of sigma-phase increased the hardness, yield strength, and tensile strength, but greatly reduced the elongation and impact toughness of the material.
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页数：14
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