Effect of Grain Modifier on Mechanical and Tribological Properties of Al-Si Alloy and Composite

被引：17

作者：

Radhika, N. ^{[1
]}

Sasikumar, J. ^{[1
]}

Jojith, R. ^{[1
]}

机构：

[1] Amrita Vishwa Vidyapeetham, Amrita Sch Engn, Dept Mech Engn, Coimbatore, Tamil Nadu, India

来源：

SILICON | 2021年 / 13卷 / 03期

关键词：

Grain modifier; Heat treatment; Spheroidization; Reciprocating wear; DRY SLIDING WEAR; ALUMINUM-MATRIX COMPOSITES; TENSILE PROPERTIES; HEAT-TREATMENT; MG ALLOY; MICROSTRUCTURE; SR; CU; HARDNESS; SILICON;

D O I：

10.1007/s12633-020-00476-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study investigates the effect of Strontium (Sr) grain modifier addition on Al-9Si alloy and B4C reinforced composite fabricated by two step gravity casting technique. The optimum level of Sr was identified as 0.08 wt.% for complete modification. The modified cast components were thermally treated by T6 temper to enhance the tribo-mechanical properties. Metallographic observation revealed the transformation of acicular Si grains to fine fibrous in as-cast condition, which later transformed to spheroidised eutectic Si after heat treatment. The combined effect of grain modification by Sr and the influence of spheroidised eutectic Si enhanced the mechanical properties. Heat treated modified composite exhibited superior tribological properties when compared to other components under varying applied normal loads and sliding distances. Worn mechanism of heat treated modified composite was observed to be minor delamination wear regime at high load (55 N) and sliding distance (1500 m).

引用

页码：841 / 855

页数：15

共 49 条

[11] Metal matrix composites: production by the stir casting method [J].

Hashim, J ;

Looney, L ;

Hashmi, MSJ .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1999, 93 :1-7

[12] Modification of eutectic silicon in Al-Si alloys [J].

Hegde, Sathyapal ;

Prabhu, K. Narayan .

JOURNAL OF MATERIALS SCIENCE, 2008, 43 (09) :3009-3027

[13] Microstructure and mechanical properties of (B4C+Al3Ti)/Al hybrid composites fabricated by a two-step stir casting process [J].

Hu, Qiyao ;

Zhao, Haidong ;

Ge, Jilong .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2016, 650 :478-482

[14] Impact toughness and fractography of Al-Si-Cu-Mg base alloys [J].

Ibrahim, M. F. ;

Samuel, E. ;

Samuel, A. M. ;

Al-Ahmari, A. M. A. ;

Samuel, F. H. .

MATERIALS & DESIGN, 2011, 32 (07) :3900-3910

[15] Aluminum Silicon Carbide Particulate Metal Matrix Composite Development Via Stir Casting Processing [J].

Inegbenebor, A. O. ;

Bolu, C. A. ;

Babalola, P. O. ;

Inegbenebor, A. I. ;

Fayomi, O. S. I. .

SILICON, 2018, 10 (02) :343-347

[16]

Irfan Ul Haq Mir, 2018, Materials Today: Proceedings, V5, P19916, DOI 10.1016/j.matpr.2018.06.357

[17]

Jarfors A.E.W., 2015, HDB MANUFACTURING EN

[18] Investigation of Mechanical and Tribological Behaviour of Heat-Treated Functionally Graded Al-7Si/B4C Composite [J].

Jojith, R. ;

Radhika, N. .

SILICON, 2020, 12 (09) :2073-2085

[19] Enhancement of mechanical and sliding wear properties of functionally graded Al-12Si-Cu composites [J].

Jojith, R. ;

Radhika, N. .

MATERIALS RESEARCH EXPRESS, 2019, 6 (09)

[20] Fabrication of LM 25/WC functionally graded composite for automotive applications and investigation of its mechanical and wear properties [J].

Jojith, R. ;

Radhika, N. .

JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING, 2018, 40 (06)

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