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

被引：6

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.

引用

页数：14

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