کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5455321 | 1514640 | 2017 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fatigue and fracture behaviour of laser powder bed fusion stainless steel 316L: Influence of processing parameters
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Fatigue and fracture behaviour of laser powder bed fusion stainless steel 316L: Influence of processing parameters Fatigue and fracture behaviour of laser powder bed fusion stainless steel 316L: Influence of processing parameters](/preview/png/5455321.png)
چکیده انگلیسی
The laser powder bed fusion (L-PBF) process involves a large number of processing parameters. Extending the intricate relationship between processing and structure to mechanical performance is essential for structural L-PBF materials. The high cycle fatigue properties of L-PBF parts are very sensitive to process-induced porosities which promote premature failure through the crack initiation mechanisms. Results from this work show that for stainless steel 316 L, porosity does not impinge on the high cycle fatigue properties when processing is kept within a ±30% tolerance band. In this 'optimum' processing region, crack initiation takes place due to defects at the solidification microstructure level. Beyond the 'optimum' processing region, over-melting and under-melting can lead to porosity-driven cracking and inferior fatigue resistance. In addition, regardless of the processing condition, fatigue resistance was found to follow a direct linear relationship with ductility and tensile strength in the low and high stress fatigue regimes respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 703, 4 August 2017, Pages 251-261
Journal: Materials Science and Engineering: A - Volume 703, 4 August 2017, Pages 251-261
نویسندگان
Meng Zhang, Chen-Nan Sun, Xiang Zhang, Phoi Chin Goh, Jun Wei, David Hardacre, Hua Li,