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Reasearch and calculation of stacking fault energy for austenitic high manganese steel when changing vanadium content

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This paper presents the results of the research on stacking-fault energy (SFE) calculation for austenitic high manganese steel (HMnS) when changing the Vanadium content. Results show that: With austenitic high manganese steel, even at temperature down to 2200K, SFE value is still greater than 20 mJ/m2 so there can not be ε - martensitic transformation. | CELEBRATE VIET NAM TEACHERS’ DAY 20/11/2018 REASEARCH AND CALCULATION OF STACKING-FAULT ENERGY FOR AUSTENITIC HIGH MANGANESE STEEL WHEN CHANGING VANADIUM CONTENT NGUYEN DUONG NAM1, LE VAN TRUNG1, PHAM MAI KHANH2 1Institute of Mechanical Engineering - Vietnam Maritime University 2School of Materials Science and Engineering - Hanoi University of Science and Technology Abstract This paper presents the results of the research on stacking-fault energy (SFE) calculation for austenitic high manganese steel (HMnS) when changing the Vanadium content. Results show that: With austenitic high manganese steel, even at temperature down to 2200K, SFE value is still greater than 20 mJ/m2 so there can not be ε - martensitic transformation. By calculation, the twinning or sliding strips can be found on this steel. In addition, when vanadium occurs there is a greater SFE value than that of non-Vanadium samples. Moreover, with the value of SFE, the mechanical of HMnS can not increased durability by the martensitic phase transformation. Keywords: Stacking-fault energy, ε - martensitic transformation, twinning, sliding strip, high manganese steel. Tóm tắt Bài báo này trình bày các kết quả nghiên cứu về tính toán năng lượng khuyết tật xếp (SFE) cho thép austenit mangan cao (HMnS) khi thay đổi hàm lượng Vanadi. Kết quả nghiên cứu cho thấy: Với thép austenite mangan cao khi xử lý ở 220 0K, giá trị SFE là trên 20mJ/m2 do vậy không thể có chuyển biến mactenxit dạng ε. Bằng tính toán, với thép này có thể tìm thấy song tinh hoặc dải trượt. Ngoài ra, khi đưa thêm Vanadi vào trong thép, giá trị SFE lớn hơn với mẫu không có Vanadi. Hơn nữa, với giá trị của SFE, cơ tính của thép HMnS không tăng bởi chuyển pha mactenxit. Từ khóa: Khuyết tật xếp; chuyển pha mactenxit – ε; song tinh; dải trượt; thép mangan cao 1. Introduction The stacking-fault energy (SFE) is a characteristic of the material to determine the phase transformation. SFE helps us determine the phase transformation; thereby enhancing .

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Reasearch and calculation of stacking fault energy for austenitic high manganese steel when changing vanadium content

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