ABSTRACT:
The influence of helium co-injection at rates from 0 to 4 appm He/dpa on swelling in ferritic-martensitic alloys T91 and HT9 was explored. Irradiations with 5.0 MeV Fe++ ions and degraded He++ ions were performed at 445°C up to damage levels of 150 dpa and helium co-injection rates of 0, 0.02, 0.2 and 4 appm He/dpa in T91, and at 460°C to a damage level of 188 dpa and helium co-injection rates of 0, 0.06 and 4 appm He/dpa in HT9. Helium was observed to enhance cavity nucleation at low damage levels, resulting in the maximum swelling at the highest helium co-injection rate. As the damage level was increased, the helium content at which swelling was maximized shifted to lower helium concentrations, ultimately resulting in the highest swelling occurring with zero helium by 150 dpa. This behavior was due to the helium-stabilized bubble microstructure that increased the cavity sink strength and reduced both cavity growth rate and swelling relative to the helium-free condition.
Upcoming Events
Jul
11
Mon
all-day
Flex@West | SEMICON West 2022
@ Moscone Center
Flex@West | SEMICON West 2022
@ Moscone Center
Jul 11 – Jul 14 all-day

The FLEX Conference & Exhibition is Co-locating with SEMICON West 2022 SEMICON West, North America’s premier microelectronics exhibition and conference that unites players across the entire electronics manufacturing and design supply chain, and the FLEX[...]
Jul
31
Sun
all-day
Microscopy & Microanalysis 2022 ...
@ Oregon Convention Center
Microscopy & Microanalysis 2022 ...
@ Oregon Convention Center
Jul 31 – Aug 4 all-day

Don’t miss out on the premier microscopy education and networking event of the year – Microscopy & Microanalysis 2022 in Portland, Oregon! Portland provides an ideal summer backdrop for what promises to be another stellar[...]
Sep
13
Tue
all-day
IMAT 2022
@ Ernest N. Morial Convention Center
IMAT 2022
@ Ernest N. Morial Convention Center
Sep 13 – Sep 14 all-day

ASM is the only society that unites different market segments that cross the entire materials world. IMAT is the new ASM International annual meeting and, in keeping with our focus on membership needs, will offer[...]
Oct
9
Sun
all-day
Materials Science & Technology (...
@ David L. Lawrence Convention Center
Materials Science & Technology (...
@ David L. Lawrence Convention Center
Oct 9 – Oct 13 all-day

The Materials Science & Technology (MS&T) technical meeting and exhibition is the long-standing, recognized forum for fostering technical innovation at the intersection of materials science, engineering, and application. Each year, MS&T brings together scientists, engineers,[...]
Oct
14
Fri
all-day
NSH Convention 2022
@ Reno-Sparks Convention Center
NSH Convention 2022
@ Reno-Sparks Convention Center
Oct 14 – Oct 19 all-day

The NSH Convention forms the largest educational event of its kind working to advance and promote the histology profession. NSH is the premier source of learning, knowledge and future-oriented research for histology professionals. Attendance provides[...]
Oct
31
Mon
all-day
ISTFA 2022
@ The Westin Pasadena
ISTFA 2022
@ The Westin Pasadena
Oct 31 – Nov 2 all-day

The demand for higher performance and lower power-consumption microelectronic devices has driven semiconductor technology to shrink continuously according to Moore’s Law. Furthermore, for latest technologies in nano realm, a new set of disruptive development in[...]
Nov
12
Sat
all-day
Neuroscience 2022
@ San Diego Convention Center
Neuroscience 2022
@ San Diego Convention Center
Nov 12 – Nov 16 all-day

Each year, scientists from around the world congregate to discover new ideas, share their research, and experience the best the field has to offer. Attend so you can: present research, network with scientists, attend session[...]
Nov
27
Sun
all-day
MRS Fall Meeting & Exhibit 2022
@ Hynes Convention Center
MRS Fall Meeting & Exhibit 2022
@ Hynes Convention Center
Nov 27 – Dec 2 all-day

The 2022 MRS Fall Meeting will be held November 27 through December 2, 2022, in Boston, Massachusetts, at the Hynes Convention Center and adjacent Sheraton Boston Hotel. The world’s foremost international scientific gathering for materials[...]
Dec
3
Sat
all-day
ASCB 2022
@ Washington, DC
ASCB 2022
@ Washington, DC
Dec 3 – Dec 7 all-day

Cell Bio, the joint meeting of the American Society for Cell Biology (ASCB) and European Molecular Biology Organization (EMBO), is an arena to showcase a diverse global community of the brightest minds in cell biology.[...]