| کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
|---|---|---|---|---|
| 1640913 | 1517203 | 2016 | 4 صفحه PDF | دانلود رایگان |
کلمات کلیدی
1.مقدمه
2. عملی
عکس 1: میکرو عکس سطح مقطع نقطه اتصال هیبریدی (weld zone = منطقه جوش) (reaction layer=لایه واکنش)
3. نتایج و بحث
عکس 2: میکروساختار نقطه اتصال: (a) عکس SEM جوش در نزدیکی آلیاژ تیتانیوم, (b) عکس SEM از خط جوش, (C) عکس اپتیکی از لایه واکنش در وجه مشترک Nb - SS: (d) عکس SEM از لایه واکنش در وجه مشترک Nb - SS
جدول 1: ترکیب شیمیایی هر فاز بر حسب درصد
عکس 3: منحنی کشش نقطه اتصال, عکس SEM و نتایج آنالیز XRD شکافت سطح: (a) منحنی کشش نقطه اتصال, (b) اطراف TC4, (C) کنار SS, (d) کنار TC4, (e) کنار SS
4. نتیجه گیری
• A hybrid joint based on two kinds of bonding mechanism.
• The unmelted part of Nb interlayer acted as a diffusion barrier between Ti and Fe.
• The unmelted Nb interlayer was beneficial to relieve and accommodate the thermal stress.
Pulsed laser welding of TC4 Titanium alloy to SUS301L stainless steel with Nb sheet as interlayer was applied and a hybrid joint was obtained comprising two metallurgical bonding zones based on two different kinds of joining mechanisms. During welding, the laser was focused near the Titanium alloy-Nb interface, so that Titanium alloy and Nb sheet partially melted and fusion welding process was realized at the Titanium alloy-Nb interface, while liquid phase diffusion bonding occurred at the Nb-stainless steel interface due to eutectic reaction between Fe and Nb element. No Ti-Fe intermetallic was detected in the weld showing that interdiffusion and reaction between Ti and Fe was effectively prevented. A reaction layer was formed at the Nb-stainless steel interface with the main microstructure of Fe7Nb6, Fe2Nb and α-Fe. The joint fractured at the reaction layer with the maximum tensile strength of 370 MPa.
Journal: Materials Letters - Volume 185, 15 December 2016, Pages 152–155