Effect of Sintering Time on the Densification, Microstructure, Weight Loss and Tensile Properties of a Powder Metallurgical Fe-Mn-Si Alloy
This work investigated the isothermal holding time dependence of the densification, microstructure, weight loss, and tensile properties of Fe-Mn-Si powder compacts. Elemental Fe, Mn, and Si powder mixtures with a nominal composition of Fe-28Mn-3Si (in weight percent) were ball milled for 5 h and sub...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2017-03-01
|
| Series: | Metals |
| Subjects: | |
| Online Access: | http://www.mdpi.com/2075-4701/7/3/81 |
| _version_ | 1818950102902898688 |
|---|---|
| author | Zhigang Xu Michael A. Hodgson Keke Chang Gang Chen Xiaowen Yuan Peng Cao |
| author_facet | Zhigang Xu Michael A. Hodgson Keke Chang Gang Chen Xiaowen Yuan Peng Cao |
| author_sort | Zhigang Xu |
| collection | DOAJ |
| description | This work investigated the isothermal holding time dependence of the densification, microstructure, weight loss, and tensile properties of Fe-Mn-Si powder compacts. Elemental Fe, Mn, and Si powder mixtures with a nominal composition of Fe-28Mn-3Si (in weight percent) were ball milled for 5 h and subsequently pressed under a uniaxial pressure of 400 MPa. The compacted Fe-Mn-Si powder mixtures were sintered at 1200 °C for 0, 1, 2, and 3 h, respectively. In general, the density, weight loss, and tensile properties increased with the increase of the isothermal holding time. A significant increase in density, weight loss, and tensile properties occurred in the compacts being isothermally held for 1 h, as compared to those with no isothermal holding. However, further extension of the isothermal holding time (2 and 3 h) only played a limited role in promoting the sintered density and tensile properties. The weight loss of the sintered compacts was mainly caused by the sublimation of Mn in the Mn depletion region on the surface layer of the sintered Fe-Mn-Si compacts. The length of the Mn depletion region increased with the isothermal holding time. A single α-Fe phase was detected on the surface of all of the sintered compacts, and the locations beyond the Mn depletion region were comprised of a dual dominant γ-austenite and minor ε-martensite. |
| first_indexed | 2024-12-20T09:13:15Z |
| format | Article |
| id | doaj.art-1fb56c69d316487f818fe58004d41c18 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-20T09:13:15Z |
| publishDate | 2017-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-1fb56c69d316487f818fe58004d41c182022-12-21T19:45:29ZengMDPI AGMetals2075-47012017-03-01738110.3390/met7030081met7030081Effect of Sintering Time on the Densification, Microstructure, Weight Loss and Tensile Properties of a Powder Metallurgical Fe-Mn-Si AlloyZhigang Xu0Michael A. Hodgson1Keke Chang2Gang Chen3Xiaowen Yuan4Peng Cao5Department of Chemical and Materials Engineering, University of Auckland, Private Bag 92019, Auckland 1142, New ZealandDepartment of Chemical and Materials Engineering, University of Auckland, Private Bag 92019, Auckland 1142, New ZealandMaterials Chemistry, RWTH Aachen University, D-52056 Aachen, GermanyState Key Laboratory of Porous Metal Materials, Northwest Institute for Non-ferrous Metal Research, Xi’an 710016, ChinaSchool of Engineering and Advanced Technology, Massey University, Private Bag 102904, Auckland 0745, New ZealandDepartment of Chemical and Materials Engineering, University of Auckland, Private Bag 92019, Auckland 1142, New ZealandThis work investigated the isothermal holding time dependence of the densification, microstructure, weight loss, and tensile properties of Fe-Mn-Si powder compacts. Elemental Fe, Mn, and Si powder mixtures with a nominal composition of Fe-28Mn-3Si (in weight percent) were ball milled for 5 h and subsequently pressed under a uniaxial pressure of 400 MPa. The compacted Fe-Mn-Si powder mixtures were sintered at 1200 °C for 0, 1, 2, and 3 h, respectively. In general, the density, weight loss, and tensile properties increased with the increase of the isothermal holding time. A significant increase in density, weight loss, and tensile properties occurred in the compacts being isothermally held for 1 h, as compared to those with no isothermal holding. However, further extension of the isothermal holding time (2 and 3 h) only played a limited role in promoting the sintered density and tensile properties. The weight loss of the sintered compacts was mainly caused by the sublimation of Mn in the Mn depletion region on the surface layer of the sintered Fe-Mn-Si compacts. The length of the Mn depletion region increased with the isothermal holding time. A single α-Fe phase was detected on the surface of all of the sintered compacts, and the locations beyond the Mn depletion region were comprised of a dual dominant γ-austenite and minor ε-martensite.http://www.mdpi.com/2075-4701/7/3/81Fe-Mn-Si alloyisothermal holding timepowder sinteringdensityweight losstensile properties |
| spellingShingle | Zhigang Xu Michael A. Hodgson Keke Chang Gang Chen Xiaowen Yuan Peng Cao Effect of Sintering Time on the Densification, Microstructure, Weight Loss and Tensile Properties of a Powder Metallurgical Fe-Mn-Si Alloy Metals Fe-Mn-Si alloy isothermal holding time powder sintering density weight loss tensile properties |
| title | Effect of Sintering Time on the Densification, Microstructure, Weight Loss and Tensile Properties of a Powder Metallurgical Fe-Mn-Si Alloy |
| title_full | Effect of Sintering Time on the Densification, Microstructure, Weight Loss and Tensile Properties of a Powder Metallurgical Fe-Mn-Si Alloy |
| title_fullStr | Effect of Sintering Time on the Densification, Microstructure, Weight Loss and Tensile Properties of a Powder Metallurgical Fe-Mn-Si Alloy |
| title_full_unstemmed | Effect of Sintering Time on the Densification, Microstructure, Weight Loss and Tensile Properties of a Powder Metallurgical Fe-Mn-Si Alloy |
| title_short | Effect of Sintering Time on the Densification, Microstructure, Weight Loss and Tensile Properties of a Powder Metallurgical Fe-Mn-Si Alloy |
| title_sort | effect of sintering time on the densification microstructure weight loss and tensile properties of a powder metallurgical fe mn si alloy |
| topic | Fe-Mn-Si alloy isothermal holding time powder sintering density weight loss tensile properties |
| url | http://www.mdpi.com/2075-4701/7/3/81 |
| work_keys_str_mv | AT zhigangxu effectofsinteringtimeonthedensificationmicrostructureweightlossandtensilepropertiesofapowdermetallurgicalfemnsialloy AT michaelahodgson effectofsinteringtimeonthedensificationmicrostructureweightlossandtensilepropertiesofapowdermetallurgicalfemnsialloy AT kekechang effectofsinteringtimeonthedensificationmicrostructureweightlossandtensilepropertiesofapowdermetallurgicalfemnsialloy AT gangchen effectofsinteringtimeonthedensificationmicrostructureweightlossandtensilepropertiesofapowdermetallurgicalfemnsialloy AT xiaowenyuan effectofsinteringtimeonthedensificationmicrostructureweightlossandtensilepropertiesofapowdermetallurgicalfemnsialloy AT pengcao effectofsinteringtimeonthedensificationmicrostructureweightlossandtensilepropertiesofapowdermetallurgicalfemnsialloy |